Furlex 50S Furling System. For many years, Furlex furling systems have stood for top quality, reliability and sailing fun. The Furlex 50S is for open keel boats and cabin boats of up to 26 feet. As there is little need to furl foresails on smaller boats, this system turns parallel. The high quality of this system is underlined by the proven stainless-steel Furlex bearings, which feature load distribution. The cleanly worked aluminium profile is centred and insulating using an additional plastic inner profile. Clean sail setting guaranteed. The Furlex includes the forestay, tug, lead block, shackle, toggle and halyard leads. The Furlex 50S is suitable for a forestay diameter of 4 - 5 mm.