Harken soft-attach Fly blocks are designed to provide strength without mass, providing sailors with big power in a low-aero package. Designed specifically for high-tech line, these efficient blocks have an incredible working load for their small size. Fly blocks are perfect for ruse on dinghies and sports boats and for kicker cascades and backstay systems on Grand-Prix racers. 18mm blocks feature and integrated stainless steel inner race and rivet, stainless steel ball bearings, and composite fibre-reinforced side plates. A length of Spectra line with a polyester cover is included. Please refer to the Harken data sheet for more details HERE how to fasten your Harken fly blocks. Use the 2161 ‘tight cinching’ 18mm in applications where the block needs to be secured extremely close to the deck. A length of Spectra line with a polyester cover is included. Block Properties Sheave diameter 28 mm Length 28 mm Weight 7.2 g Max. line diameter 5 mm Max. working load 125 kg Breaking load 450 kg
