75mm Carbo Air® Quad Block
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HARKEN75mm Carbo Air® Quad Block


Fulfilled from vendor
Model # 6840383 | Mfg # 2677UPC # 97653144595
75mm Carbo Air® Quad Block




75mm Carbo Air® Quad Block

Name Value
Ball Bearings Plastic
Becket No Becket
Diameter 9/16 Inch or 14 mm
Direction Any
Integral Cleat No Integral Cleat
Length 6 1/4 Inches
Mount Type Swivel Shackle
Ratchet Non Ratcheting
Safe Working Load 3639 Pounds
Sheave Diameter 75 mm
Type Quad
Weight 27.2 Ounces

Product Overview

Harken 75mm Carbo Air® Quad Block allows either a high-load purchase of 5:1 to 6:1.

Low-friction Carbo AirBlocks® are lightweight, strong, reliable—and economical. Consistently 30% lighter and 60% stronger than equivalent Classic blocks. The sideplates are UV-stabilized, high-strength resin and designed for small-diameter lines favored by racers. Good for jib and mainsheet systems on high-performance dinghies, and for high-load control lines on small keelboats.

Recipient of both the Dame Award and Sail Magazine’s Freeman-Pittman Award for innovation, this innovative line of blocks turns fiber-reinforced composite construction into a reliable strength-to-weight ratio you can depend on. Companions to the popular Harken Black Magic block line, these small, compact blocks work well with very high working loads for easy trimming.

Key Features 

  • High strength-to-weight ratio block
  • Harken’s most innovative blocks
  • 30% lighter, 60% stronger than equivalent conventional blocks
  • Smaller block for jib and mainsheet systems on high-performance dinghies 
  • Use for high-load control lines on small keelboats
  • Stainless steel swivel shackle
  • Sheave Diameter: 2 15/16" (75 mm)
  • Max. Line Diameter: 9/16" (14 mm)
  • Max. Working Load (MWL): 3639 lb. (1650 kg) 
  • Breaking Load: 10000 lb. (4535 kg)
  • Weight: 27.2 oz. (772 g)
  • Length: 6 1/4" (159 mm)


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