Ribbed boat trailer side rollers with poles and split clamps, galvanized finish, comes with cushioned non marking boat trailer rollers, fitted onto a 300mm long galvanized roller stem. Mounted on a 400mm long 34mm diameter galvanized stem held by a bzp split clamp. You will receive a full set of four comprises of four boat trailer split clamps, 4 upright poles, 4 spindles and eight ribbed rollers.