Description The marine grade aluminum base consists of a 1 diameter ball and 2 25 x 0 87 base with 11mm hole This part is often used on motorcycles attaching to the mirror frame suitable for the RAM B 252U This part fits well on many handlebar pinchbolts with a washer base is 5mm thick Specification Material Powder coated marine grade aluminumBall Size 1 rubber ballColor BlackSize 38x60mm Note Please allow 1 3CM differs due to manual measurement Due to the different display and different light the picture may not reflect the actual color of the item Thanks for your understanding Package Included 1 X Aluminum 1 Ball with Diamond Plate