Use for Mad River canoes outfitted with the Wooden Canoe Seat and a range of canoes with wooden outfitting. The Seat Truss is a one piece unit that suspends the seat, providing increased stiffness, strength, and efficiency. (It can be used in place of separate seat tubes.) The Ash Wood truss provides a maximum of 4 in (10cm) drop and can be stained to match existing trim. Screw Holes are 8.25 inches on center and 3.5 inches deep. Sold in pairs and can be cut to fit specific applications. Hardware sold separately, re-use original hardware if possible. WOODCANOE