Pasenger backrest works with Mustang Vintage passenger seats only Passenger backrest assembly measures 12" W x 7" H The chromed, knurled thumbscrew easily adjusts the tilt angle of the backrest forward or back up to 2" while you are seated The backrest post is notched allowing four easy "snap-in-place" height adjustment positions (approx. 3") The backrest folds completely flat when riding without passenger The contoured backrest pad pivots to match back angle of passenger's back Seat and backrest assembly are sold separately Made in the U.S.A.