57mm Carbo Air® Quadruple Block
Mouse Over to Zoom
Click to Enlarge

HARKEN57mm Carbo Air® Quadruple Block


Fulfilled from vendor
Model # 6580229 | Mfg # 2631UPC # 97653119432
57mm Carbo Air® Quadruple Block


5.0 Stars


57mm Carbo Air® Quadruple Block

Name Value
Ball Bearings Plastic
Becket No Becket
Diameter 7/16 Inch or 11 mm
Direction Any
Integral Cleat No Integral Cleat
Length 4 3/4 Inches
Mount Type Swivel Shackle
Ratchet Non Ratcheting
Safe Working Load 2380 Pounds
Sheave Diameter 57 mm
Type Quad
Weight 12 Ounces

Product Overview

Low-friction 57mm Carbo Air® Quadruple Block is lightweight, strong, reliable—and affordable. 30 percent lighter and 60 percent stronger than equivalent blocks. Sideplates are UV-stabilized, high-strength resin. Ball bearings are made from engineered plastic in fitted ball races.

The 57mm Carbo Air® blocks have an enormous working range that makes them ideal for main and jib sheets, spinnaker halyards and control lines. This range handles loads similar to Harken’s 3" standard blocks. Recipient of both the Dame Award and Sail Magazine's Freeman-Pittman Award for innovation.


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.

Related West Advisor Articles


Product Q & A