The RAM-B-252U marine grade aluminum base consists of a 1" diameter ball and 2.25" x 0.875" base with 11mm hole. This part is often used on motorcycles, attaching to the mirror frame, the main brand of bike for the RAM-B-252U is BMW. This part fits well on many handlebar pinchbolts with a washer (base is 5mm thick).

(QTY. 1) 1" Rubber ball
(QTY. 1) M8 x 55 bolt (1.25 thread pitch)
(QTY. 1) M8 x 60 bolt (1.25 thread pitch)
(QTY. 1) M8 x 65 bolt (1.25 thread pitch)