The RAM-B-231CHU consists of 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 1.25" 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 1.25" in diameter.
Material: Marine Grade Aluminum with Chrome Finish
Ball Size: 1" Rubber Ball "B" Size
Note: The "U" in the part number reflects product packaged in poly bag.