Ball Mount - 1" - Brake/Clutch Reservoir Base - Mount electronic devices to your handlebar clutch/ brake clamp - Holds two 1" diameter mounting balls - Ball that is connected between hole centers is removable - Includes 40mm x 6mm stainless steel hardware - To see if this base will mount to your motorcycle, check hole spacing of base against your clutch/brake reservoir. The holes centers have a minimum width of 0.94" and a maximum of 1.58".