Manufacturer part #: 2646
   Technical Description
 Single/Swivel/423 Carbo-Cam®/Becket
1 9/16 in
40 mm
4 in
102 mm
4.3 oz
122 g
5/32 in
4 mm
1/4 in
6 mm
300 lb
136 kg
600 lb
272 kg
 Carbo AirBlocks® are 60% stronger and 30% lighter than Harken's Classic blocks. Use the 40 mm Carbo for jib and mainsheet systems on high-performance dinghies and for loaded control lines on small keelboats. 
The nylon-resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Sheaves spin on high-load ball bearings with fitted races for low-friction operation.
Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.
Use for:Main/jib sheets  Mainsheet fine-tune Control lines Vangs Cunninghams Outhauls 
        
    The nylon-resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Sheaves spin on high-load ball bearings with fitted races for low-friction operation.
Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.
Use for: