2 machined aluminum spacers (some kits may include a sleeve) for mounting 1 end of Manitou rear shocks (air or coil)Sold as a set of 2 spacers: 2 sets required per shock, 1 per each eyeletSized by bolt diameter (M6 or M8) and frame mount ID width (in mm)This hardware is for bolt size: M8frame mount: 23.0mm