Black Drivers Motorcycle Backrest to fit Corbin Seats This new backrest is 100% American made in St. Michael, MN by Harrison Specialties - manufacturing aftermarket motorcycle backrests since 2006. 12" wide X 10" high Pad angle is adjustable and has 2" of foam padding for comfortable back support. Fits Corbin and other seats that accept a backrest with a 5/8" square stem that is 4.5" long. Removable, comes with bolt to secure inside seat when in use.