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HARKEN 57mm Black Magic® AirBlocks®

Strong, lightweight aluminum blocks for offshore boats

Used for sheets, halyards, running backstays and control lines on offshore boats, these strong, lightweight blocks are made of sculpted aluminum with Torlon rollers and carbon black balls for strength and UV protection.

  • Sheave: 6061-T6 Hardkote anodized aluminum
  • Cheek Material/Finish: 6160-T6 Hardkote anodized aluminum
  • Sheave Size: 57mm (2-1/4")
  • Line Dia: 7/16" (12mm) max
  • Construction: Three fasteners for quick disassembly. Plastic isolators separate dissimilar metals
  • Three-way head system. Swivels or can be locked in front/side position; 1/4" pin
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
57mm Black Magic AirBlock, Flip-Flop with Lockoff, 2,500lb. SWL, 11.8oz. 9485780 3194
Delivery within 2 - 3 weeks.

$269.99

Product Description

Strong, lightweight aluminum blocks for offshore boats

Used for sheets, halyards, running backstays and control lines on offshore boats, these strong, lightweight blocks are made of sculpted aluminum with Torlon rollers and carbon black balls for strength and UV protection.

  • Sheave: 6061-T6 Hardkote anodized aluminum
  • Cheek Material/Finish: 6160-T6 Hardkote anodized aluminum
  • Sheave Size: 57mm (2-1/4")
  • Line Dia: 7/16" (12mm) max
  • Construction: Three fasteners for quick disassembly. Plastic isolators separate dissimilar metals
  • Three-way head system. Swivels or can be locked in front/side position; 1/4" pin

Specs

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