RAM Chrome Rail Base with Stainless Steel U-Bolt & 1" Ball for Rails from 0.5" to 1" in DiameterThe RAM motorcycle chrome handlebar base contains a 1" rubber ball designed to sit at right angles to the mounting rail. The rust proof metal u-bolt accommodates rails in diameter from 0.5" to 1" in diameter. The base also includes black cover caps to be placed over the exposed ends of the u-bolt. U-Bolt Dimensions:Accommodates rails from 0.5" to 1" in diameter. Material: Powder Coated Marine Grade Aluminum Ball Size: 1" Rubber Ball "B" Size Note: The "U" in the part number reflects product packaged in poly bag. Component 6 NONE