Harken 150mm
Black Magic®
Air Blocks®


Feature Torlon® rollers in a self-contained center cage. Rollers stay parallel for low-friction efficiency. UV-resistant, carbon-black Delrin® balls carry sideloads.Used on offshore boats, these blocks offer a no “climb- out” deep groove sheave with radiused edges to protect line. Sculpted aluminum sideplates and thin-profile sheaves make these blocks very lightweight. No stainless-to-aluminum contact prevents corrosion.The 3201 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


  • 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 150 mm Aluminum Block - Swivel
    Harken 150 mm Aluminum Block - Swivel

    Harken 150 mm Aluminum Stand-up Block
    Harken 150 mm Aluminum Stand-up Block

    Harken 150 mm Aluminum Center Becket
    Harken 150 mm Aluminum Center Becket