This Harken 29mm 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,
these efficient blocks have an incredible working load for their small
size. Fly blocks are perfect for use on foiling dinghies and sportboats
and for vang cascades and backstay systems on Grand-Prix racers.
29 mm blocks feature a one-piece titanium
outer race/sheave, stainless steel ball bearings and inner race, and
composite fiber-reinforced sideplates.