The RAM motorcycle handlebar base contains a 1.5" rubber ball designed to sit at right angles to the mounting rail. The zinc coated 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. 

Material: 
Powder Coated Marine Grade Aluminum 

Ball Size: 
1.5" Rubber Ball Size 

Note: 
The "U" in the part number reflects product packaged in poly bag.