Harken 57mm Carbo Blocks

Harken 57mm Carbo Blocks
Carbo AirBlocks are 60% stronger and 30% lighter than our classic blocks.

The nylon resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Ball bearings, sheave and sideplates UV stabilized with black additive for maximum protection.

Blocks feature Cam-Lock or U-Lock locking systems to lock the shackle in front or side positions, or swivel to keep line from twisting.

The high-load 57 mm Carbo has a broad working range. Use for main and jib sheets on centerboard and keelboats like Lightnings, Dragons, Solings, J/24s and for mainsheet systems on catamarans.

Use for:


  • Main/jib sheets

  • Mainsheet fine-tune

  • Control lines

  • Vangs

  • Cunninghams

  • Outhauls

  • Harken 57mm Single Swivel Carbo Block
    Regular price: $48.55
    Sale Price : $38.69
    Harken 57mm Single Swivel Carbo Block w/ Becket
    Regular price: $54.35
    Sale Price : $43.19
    Harken 57mm Carbo Cheek Block
    Regular price: $44.65
    Sale Price : $35.99
    Harken 57mm Single Carbo Block w/ Cam Cleat
    Regular price: $137.75
    Sale Price : $108.89
    Harken 57mm Single Carbo Block w/ Cam Cleat & Becket
    Regular price: $143.50
    Sale Price : $113.39
    Harken 57mm Double Swivel Carbo Block
    Regular price: $103.30
    Sale Price : $81.89
    Harken 57mm Double Swivel Carbo Block w/ Becket
    Regular price: $109.10
    Sale Price : $86.39
    Harken 57mm Triple Swivel Carbo Block
    Regular price: $148.35
    Sale Price : $117.89
    Harken 57mm Triple Swivel Carbo Block w/ Becket
    Regular price: $154.10
    Sale Price : $122.39
    Harken 57mm Triple Swivel Carbo Block w/ Cam Cleat
    Regular price: $222.80
    Sale Price : $176.39
    Harken 57mm Triple Swivel Carbo Block w/ Cam Cleat & Becket
    Regular price: $228.50
    Sale Price : $180.89
    Harken 57mm Quad Carbo Block
    Regular price: $185.70
    Sale Price : $147.59
    Harken 57mm 5-Sheave Block w/ Swivel
    Regular price: $207.45
    Sale Price : $164.69
    Harken 57mm Carbo Fiddle Block
    Regular price: $58.35
    Sale Price : $46.79
    Harken 57mm Carbo Fiddle Block w/ Becket
    Regular price: $64.05
    Sale Price : $51.29
    Harken 57mm Carbo Fiddle Block w/ Cam Cleat
    Regular price: $150.30
    Sale Price : $118.79
    Harken 57mm Carbo Fiddle Block w/ Cam Cleat & Becket
    Regular price: $156.00
    Sale Price : $123.29
    Harken 57mm Carbo Fiddle Block w/ Ratchet
    Regular price: $94.05
    Sale Price : $74.69
    Harken 57mm Carbo Block Fiddle w/ Ratchet & Becket
    Regular price: $99.60
    Sale Price : $79.19
    Harken 57mm Carbo Fiddle Block w/ Ratchet & Cam
    Regular price: $180.95
    Sale Price : $143.09
    Harken 57mm Carbo Fiddle Block w/ Cam & Becket
    Regular price: $186.55
    Sale Price : $147.59