These seat assemblies are sold as a complete three-piece set including the rider solo seat, a removable driver backrest and matching passenger seat. The built-in driver backrest offers more features than any other backrest on the market like tool-less removal, a knurled thumb screw for easy adjustment and a large 12 contoured backrest pad for comfort. The deeply pocketed driver s seat is 17 wide and sits you at the ideal cruising angle. The comfortable passenger seat is 13 wide and fully supported by Mustang s unique internal steel support wings. Available in either Vintage (plain) or studded designs.