The RAM-B-231ZU consists of a B size 1" rubber ball designed to sit at right angles to the mounting rail. The zinc coated metal U-bolt accommodates rails in diameter from 0.5" to 1.25" in diameter. Included are black cover caps to be placed over the exposed ends of the U-bolt and a composite adapter that can narrow the rail to a minimum width of 0.5".

U-Bolt Dimensions:
Accommodates rails from 0.5" to 1.25" in diameter.

• Made in the USA and comes with a lifetime warranty