Skip to content Skip to navigation menu
Live Chat

57mm Black Magic® Control Two-Sheave Block


Model # 14136006 | Mfg # 3225
Ships directly from the vendor

The entire line of Black Magic® AirBlocks® offers a sleek look to match its unique, performance-packed engineering. These strong, lightweight blocks feature free-rolling, high-load Torlon® roller bearings for a high strength-to-weight ratio. Use them for sail controls that see lots of action: mainsheet, runner, halyard and spinnaker systems.

  • Sheave and cheek: 6061-T6 Hardkote anodized aluminum
  • Bearings: Torlon® roller bearings; carbon-black Delrin® ball bearings for side loads
  • Construction: Dissimilar metals isolated for corrosion resistance

57mm Black Magic® Control Two-Sheave Block

Becket No Becket
Diameter 1/2 Inch or 13 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Traveler
Ratchet Non Ratcheting
Safe Working Load 2500 Pounds
Sheave Diameter 57 mm
Type Single

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.