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Product Info

IRWIN FITNESS ROLLER J CUP 2.0 CB-4/DUFFALO BLOCKS

Irwin Fitness's Barbell Blocks, a smart and versatile solution for specialty barbell usage. Machined from solid 2.5" acetal rod, these blocks are crafted to provide a dual-purpose advantage, setting them apart from other options on the market.

Unlike many alternatives on the market, our blocks were designed to accept both 38mm and 32mm barbells. 

    IMPORTANT NOTICE U.S / CANADA SHIPPING

    New 50% Metal Tariff (Effective Immediately)

    Due to recently implemented U.S. import tariffs, all Irwin Fitness orders shipped to the United States are now subject to an additional charge.

    • Approximately 70% of your total order value reflects the metal content.
    • A 50% tariff is applied only to that metal portion.
    • In simple terms, the tariff equals roughly 35% of your total order value.

    This fee is set by the U.S. government and collected on import. We do not profit from it — it is strictly a pass-through cost.

    Shipping to the U.S.

    We now ship nationwide across the United States using Delivered Duty Paid (DDP) service — meaning no surprise fees on delivery.

    • Flat Rate Shipping:
      $650 CAD / $478 USD for LTL (less-than-truckload) shipments to U.S. terminals
    • Includes all broker and bond fees
    • Rate applies to terminal pickup only (customers are responsible for home transport)
    • Orders typically arrive at terminals faster than residential deliveries.

    Residential Delivery:

    Available upon request before checkout (a surcharge applies).

    Customs & Documentation

    We handle all brokerage through Noatum Logistics, or you may use your own U.S. Customs Broker.

    For LTL shipments, an IRS or SSN number is required for clearance (not needed for UPS).

    All shipments are subject to state taxes and U.S. Customs fees; Irwin Fitness does not collect or retain these charges.

    Canadian Shipping

    We strive to secure the best possible freight rates across Canada.

    If you live in a remote or rural area, additional delivery charges may apply. You’ll be contacted before your order ships and can either approve the extra cost or receive a full refund.

    To reduce costs:

    • Pick up at a nearby freight terminal
    • Ship to a business with a forklift or loading dock
    • Offload yourself if equipped to do so

    📧 For shipping questions: contact@irwinfitness.ca

    ROLLER J-CUP DUFFALO/CB-4 BLOCKS

    ROLLER J-CUP DUFFALO/CB-4 BLOCKS

    $135.00
    $135.00
    Sale Sold out

    irwinfitness

    custom color selection

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    RAL 6018 - Yellow Green

    RAL 1023 - Traffic Yellow

    RAL 9003 - Signal White

    RAL 2009 - Traffic Orange

    Chrome + Transparent Green (Specialty Color Inquire First)

    Chrome + Transparent Purple (Specialty Color Inquire First)

    Chrome + Candy Teal (Specialty Color Inquire First)

    Galaxy Purple

    Gloss Clear

    RAL 1019 - Grey Beige

    Iron Man Red (Specialty Color Inquire First)

    High Gloss Black

    Ocean Blue

    RAL 9010 - Pure White

    RAL 3003 - Ruby Red

    Sahara Gold

    RAL 1037 - Sun Yellow

    OD Green - Matte

    RAL 3020 - Traffic Red

    Matte Clear

    Ski-Doo Yellow - Matte

    Transparent Copper

    RAL 5011 - Steel Blue

    x

    View full details
    Product Info

    IRWIN FITNESS ROLLER J CUP 2.0 CB-4/DUFFALO BLOCKS

    Irwin Fitness's Barbell Blocks, a smart and versatile solution for specialty barbell usage. Machined from solid 2.5" acetal rod, these blocks are crafted to provide a dual-purpose advantage, setting them apart from other options on the market.

    Unlike many alternatives on the market, our blocks were designed to accept both 38mm and 32mm barbells. 

      IMPORTANT NOTICE U.S / CANADA SHIPPING

      New 50% Metal Tariff (Effective Immediately)

      Due to recently implemented U.S. import tariffs, all Irwin Fitness orders shipped to the United States are now subject to an additional charge.

      • Approximately 70% of your total order value reflects the metal content.
      • A 50% tariff is applied only to that metal portion.
      • In simple terms, the tariff equals roughly 35% of your total order value.

      This fee is set by the U.S. government and collected on import. We do not profit from it — it is strictly a pass-through cost.

      Shipping to the U.S.

      We now ship nationwide across the United States using Delivered Duty Paid (DDP) service — meaning no surprise fees on delivery.

      • Flat Rate Shipping:
        $650 CAD / $478 USD for LTL (less-than-truckload) shipments to U.S. terminals
      • Includes all broker and bond fees
      • Rate applies to terminal pickup only (customers are responsible for home transport)
      • Orders typically arrive at terminals faster than residential deliveries.

      Residential Delivery:

      Available upon request before checkout (a surcharge applies).

      Customs & Documentation

      We handle all brokerage through Noatum Logistics, or you may use your own U.S. Customs Broker.

      For LTL shipments, an IRS or SSN number is required for clearance (not needed for UPS).

      All shipments are subject to state taxes and U.S. Customs fees; Irwin Fitness does not collect or retain these charges.

      Canadian Shipping

      We strive to secure the best possible freight rates across Canada.

      If you live in a remote or rural area, additional delivery charges may apply. You’ll be contacted before your order ships and can either approve the extra cost or receive a full refund.

      To reduce costs:

      • Pick up at a nearby freight terminal
      • Ship to a business with a forklift or loading dock
      • Offload yourself if equipped to do so

      📧 For shipping questions: contact@irwinfitness.ca