Harken 57mm Carbo Quad Block

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Low-friction Carbo Air blocks are lightweight strong reliable—and affordable. Companions to the popular Harken Black Magic block line these small compact blocks have very high working loads for safe easy trimming.

  • Sheave Ø (mm) 57 mm
  • Sheave Ø (in) 2 1/4 in
  • Length (mm) 121 mm
  • Length (in) 4 3/4 in
  • Weight (g) 340 g
  • Weight (oz) 12 oz
  • Shackle pin Ø (mm) 6 mm
  • Shackle pin Ø (in) 1/4 in
  • Maximum line Ø (mm) 10 mm
  • Maximum line Ø (in) 3/8 in
  • Maximum working load (kg) 1080 kg
  • Maximum working load (lb) 2380 lb
  • Breaking load (kg) 2270 kg
  • Breaking load (lb) 5000 lb

DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.

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