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3 Series

(76 products)

Future-proofed and modular design.
  • BLK BOX Safety Arms – safety spotter arms
    Sale
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    3 Series Safety Arms

    £412.99 £550.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
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  • 3 Series Nexus Compact Rack with Storage | BLK BOX
    (0)

    3 Series Nexus Compact Rack with Storage

    FREE SHIPPING
    From £7,150.00
    • Modular design Modular design
    • Lifetime structural warranty Lifetime structural warranty
    • 14 colours available 14 colours available
    • M20 hardware M20 hardware
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  • 3 Series Nexus Compact Rack | BLK BOX
    (0)

    3 Series Nexus Compact Rack

    FREE SHIPPING
    From £6,500.00
    • Modular design Modular design
    • Lifetime structural warranty Lifetime structural warranty
    • 14 colours available 14 colours available
    • M20 hardware M20 hardware
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  • BLK BOX 3 Series Wall Mounted Rigs – wall rig system
    (2)

    3 Series Wall Mounted Rigs

    FREE SHIPPING
    From £790.00
    • Modular design Modular design
    • M20 hardware M20 hardware
    • 14 colours available 14 colours available
    • Lifetime structural warranty Lifetime structural warranty
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  • BLK BOX 3 Series Free Standing Rigs – free standing rig system
    (3)

    3 Series Free Standing Rigs

    FREE SHIPPING
    From £1,450.00
    • Modular design Modular design
    • M20 hardware M20 hardware
    • 14 colours available 14 colours available
    • Lifetime structural warranty Lifetime structural warranty
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  • BLK BOX 1 Series Compact Rack Cable Column Kit – cable column upgrade kit
    (1)

    3 Series Nexus Upgrade Kit - Compact Rack

    FREE SHIPPING
    £2,350.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
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  • BLK BOX Nexus Upgrade Kit Full Rack – cable column upgrade kit
    Stack & Save ⓘ

    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (0)

    3 Series Nexus Upgrade Kit - Full Rack

    FREE SHIPPING
    £2,450.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Feet Attachment – stabiliser feet for squat stands
    Stack & Save ⓘ

    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (1)

    3 Series Feet Attachment

    £175.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
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  • BLK BOX Dip Station Attachment – dip bar attachment
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    (8)

    3 Series Dip Station Attachment

    £145.00 £199.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Rolling Jammer Arms – jammer arm attachment
    Stack & Save ⓘ

    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (1)

    3 Series Rolling Jammer Arms

    FREE SHIPPING
    £1,400.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Wing Attachment – plate storage wing
    (0)

    3 Series Wing

    £259.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
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  • BLK BOX Low Row Bar – low row attachment
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    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (0)

    3 Series Low Row Bar

    £179.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Safety Straps – strap attachment
    Sale
    (2)

    3 Series Safety Straps

    £109.99 £229.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Squat Handles – squat handle attachment
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    3 Series Squat Handles

    £111.99 £139.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
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  • 3 Series Spotting Arms - BLK BOX
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    3 Series Spotting Arms

    £254.99 £300.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Adjustable Pull Up Bar – multi-grip pull up bar
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    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (0)

    3 Series Adjustable Pull Up Bar

    £179.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Sandwich J Hook – J-cup hook
    Sale
    (9)

    3 Series Sandwich J Hook

    £199.00 £259.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
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  • BLK BOX Lat Pull Down Seat Attachment – seat attachment
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    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (0)

    3 Series Lat Pull Down Seat Attachment

    £370.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Pivot Attachment – pivot arm for cable work
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    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (0)

    3 Series Pivot Attachment

    £250.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • BLK BOX Hip Thruster Attachment – hip thruster bar
    Sale
    (3)

    3 Series Hip Thruster Attachment

    £299.00 £375.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • ISO Pull Rack Attachment - BLK BOX
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    How it works

    • Buy 2, get 10% off
    • Buy 3, get 15% off
    • Buy 4+, get 20% off
    (0)

    3 Series ISO Pull Rack Attachment

    From £380.00
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • 3 Series Bumper Shelf | BLK BOX
    (0)

    3 Series Bumper Shelf

    From £179.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • 3 Series Round - Dumbbell Shelf | BLK BOX
    (0)

    3 Series Round-Dumbbell Shelf

    From £194.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details
  • 3 Series Hex - Dumbbell Shelf | BLK BOX
    (0)

    3 Series Hex-Dumbbell Shelf

    From £179.99
    • Precision Engineered Precision Engineered
    • Enhanced Versatility Enhanced Versatility
    • Functional Design Functional Design
    • Maximise Potential Maximise Potential
    View details

Frequently Asked Questions

What makes the 3 Series different from the 1 or 5 Series?

The 3 Series offers a modular, future-proof design using 70x70x3mm steel. It includes 4-way numbered hole spacing and a broader range of colour and branding options than the 1 Series, while remaining more accessible than the elite-level 5 Series.

What are the height options for the 3 Series racks?

Racks are available in 2.2m or 2.4m heights to suit different ceiling clearances and facility needs. Taller options (up to 3.6m) are also available for rig setups.

Can I integrate cables and storage into the 3 Series?

Yes - the 3 Series supports integrated cable columns and multiple storage attachments. It’s designed to reduce footprint while enhancing training versatility.

Is the 3 Series available in different colours?

Absolutely. The 3 Series comes in 14 standard colours with optional branding upgrades, including custom brand plates and stack guards.

What are the key differences between the 1, 3, and 5 Series?
  • 1 Series: Entry-level rigs and racks made from 60x60x3mm steel, designed for quick installation and rapid delivery.
  • 3 Series: Modular and expandable, made from 70x70x3mm steel. Ideal if you’re looking for scalability and attachment compatibility.
  • 5 Series: Premium and fully customisable, made from 80x80x3mm steel. Includes Westside hole spacing and advanced performance testing attachments.

What type of hardware is used in the Series 3 racks?

The racks use heavy-duty M20 hardware for strength and stability.

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