This Harken HK2161 soft-attach Fly block is designed to provide strength without mass, providing sailors with big power in a low-aero package. Designed specifically for high-tech line, this efficient block has an incredible working load for its small size. This Fly block is perfect for use in the 8:1 cunningham system for Laser® / ILCA®.
 
This 18 mm block features an integrated stainless steel inner, stainless steel ball bearings, and composite fiber-reinforced sideplates.
 
Sheave diameter: 18 mm
Max line diameter: 5 mm