SKU: IBWS-34757 - Features 1-inch / 25mm / B Size Ball joints that are compatible with all industry-standard 1-inch / 25 mm / B size adapters and arms. Our industry-standard mounting patterns make it easy to add on/ upgrade/ or replace a currently installed mounting solution. C-Clamp mount works with all posts, poles, handlebars, and flat surfaces from 0.75 inches to 2 inches wide.