Sunlite's Polo Seat Rail is the right part for mounting Sunlite's Polo Saddles on your favorite bike (Sunlite's Polo Saddles are sold separately and also sometimes called "banana seats"). To install, the seat's clamp fits onto the seatpost and the Seat Rail attaches to the rear wheel axle and the back of the Polo Saddle to support it. The Seat Rail has several mounting positions for getting your saddle in the most comfortable position. This sturdy-steel strut (also called a "sissy bar") boasts a beautiful polished-chrome finish to match your rig's smooth style. The 36-inch model has a built-in backrest that extends above the seat.