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 use on dinghies and sportsboats 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 download the Harken manual for correct use of this product and its application HERE Block properties Sheave diameter 18 mm Length 28 mm Weight/span> 7.2 kg Max. line dia. 5 mm Max. Working load 204 kg Breaking load 608 kg
