Harken Double Carbo Airblock with Becket - 57mm

These smooth-running powerful performers make trimming easy, no matter how hard the wind blows. Carbo Air blocks are made of tough reinforced composite in a size and style to fit any system: singles, doubles, triples, quads; ratchets and fiddles; soft and hard attach. Perfect for main, jib and spinnaker sheets on dinghies and sportboats; control lines on boats of all sizes.   

Lightweight, strong and reliable fiber-reinforced composite construction. Ball bearings, sheave, and sideplates are UV-stabilized. 

Specifications 
Sheave Ø: 57mm - 2-1/4in  
Length: 142mm - 5-5/8in  
Weight: 187g - 6.6oz 
Shackle pin Ø: 6mm - 1/4in  
Maximum line Ø: 10mm - 3/8in  
Maximum working load: 720kg - 1584lb  
Breaking load: 1500kg - 3300lb