The focal point of this seat is the incredible simplicity along with unequaled detail in design and craftmanship. Every seam and edge has been smoothed and rounded, giving it a beautiful low sleek look. Comfort is achieved by using a high density Marathon molded foam foundation built on a powder coated steel base plate. The base plate is carpeted to help protect the paint on the frames and fender. Fits Big Twin 4 speed 1958-later (except Softail).