It is also effective to dress up as you change the muffler, steering wheel etc. Product Size: Height 1.2 inches (30 mm), Diameter 1.7 inches (43 mm), Inner Diameter 1.1 inches (29 mm), Insert the axle nut, tighten it with imo screws, and attach it. Compatible Car Models: Harley Softail, Road Glide, Road King, Sportster, 1200, 883, CB1300SF, etc. (Specifications may be changed, so please check with the actual vehicle.)