This is a brand new, Honda OEM bottom out bumper sold by Schmidty Racing Suspensions to replace a cracked or missing bottom out bumper on the rear Showa shock on the Honda ATC 250R (1983-86) It is recessed in the bottom for the shaft posts on Showa ATC shocks.
Bumper Size: 49.5mm base OD x 45mm height x 14mm shaft bore