Double Block with Swivel - 29mm

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; 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. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Ball bearings, sheave, and sideplates are UV-stabilized. 

Specifications 
Sheave Ø: 29mm - 1-1/8in  
Length: 73mm - 2-7/8in  
Weight: 51g - 1.8oz  
Shackle pin Ø: 5 mm - 3/16in 
Maximum line Ø: 8mm - 5/16in  
Maximum working load: 299kg - 660lb  
Breaking load: 737kg - 1625lb 
Maximum working loads and breaking loads for blocks based on cam strengths