The Mustang Smooth Driver Backrest Kit can be used with Harley-Davidson stock or Mustang one-piece seats that have a center opening to accept a backrest The fully adjustable plain black backrest measures 7" H x 12" W Mustang Smooth Driver Backrest Kits are made in the USA Note: this Mustang Driver Backrest Kit will not work with a solo or two-piece seat The Mustang Smooth Driver Backrest Kit is also available with chrome studs 802-191 or black pearl studs 800-782