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Harken 57mm
Black Magic Airblocks


Black Magic® AirBlocks®
Use 57 mm Black Magic® AirBlocks® on offshore boats.

These strong, lightweight blocks are sculpted aluminum, with Torlon® rollers and carbon-black balls for strength and UV protection.
Rollers are housed in a unique center cage and are isolated for less friction. Blocks feature a three-way head system and come in high- and low-load configurations.
The 3195 soft attachment Loop block has a removable dead-end post for attachment to a padeye. Lashings can also be used.

Use for:
  • Sheets
  • Halyards
  • Running backstays
  • Control lines


  • We are currently adding the entire Harken line-up to our website, Thank you for your patience and understanding while we populate the Harken Section of the website.

    For your convenience, Harken's new online hardware catalog is live - filled with parts, deck layouts, system drawings, and reference materials. It is a large file so give it some time to download.

    If See something you need or like that we don't list on our site? We can get it for you, just call Landfall at 1.800.941.2219 and ask! We're here to help.




    Harken 57 mm Aluminum Low-Load Block - Swivel
    Harken 57 mm Aluminum Low-Load Block - Swivel

    Harken 57mm  Black Magic Single Swivel w/Becket
    Harken 57mm Black Magic Single Swivel w/Becket

    Harken 57mm Black Magic Double Swivel Block
    Harken 57mm Black Magic Double Swivel Block

    Harken 57 mm Aluminum Triple Block - Swivel
    Harken 57 mm Aluminum Triple Block - Swivel

    Harken 57 mm Aluminum Block - Swivel
    Harken 57 mm Aluminum Block - Swivel

    Harken 57 mm Aluminum Block - Swivel Becket
    Harken 57 mm Aluminum Block - Swivel Becket

    Harken 57 mm Aluminum Double Block - Swivel
    Harken 57 mm Aluminum Double Block - Swivel

    Harken 57 mm Aluminum Double Block - Swivel Becket
    Harken 57 mm Aluminum Double Block - Swivel Becket

    Harken 57 mm Aluminum Loop Block
    Harken 57 mm Aluminum Loop Block