FSA SL-K Monolink Seat Post: The SL-K Monolink Seatpost is specifically designed for the Selle Italia Monolink saddle, but easily adaptable to standard 7mm rail saddles. It comes with a alloy head & carbon shaft with a Uni-directional finish. 2 sizes available. Alloy head with bonded carbon shaft Medium setback for standard road products fit UD carbon shaft Fits Monolink SRL saddle (from Selle Italia), 350mm x 27.2, 31.6mm 5mm Setback UD carbon finish Colour graphics Weight: 205g (27.2mm)