The RAM zinc coated U-Bolt rail base consists of the 1" dia. ball and socket system with RAM Universal 1/4"-20 thread centered on a 2.5" diameter Plate. This mount is designed to be a universal mounting solution for both still and moving cameras. The base has a 1.0" diameter Rubber Ball designed to sit at right angles to the mounting rail. The Zinc Coated metal U-Bolt and nuts included will fit a circular rail with diameter from 1/2" to 1.0". To mount the rail base, place the top of the base on the rail and then slide the u-bolt around the rail, into the holes in the base top. Now tighten the screws onto the u-bolt until the base is clamped firmly. If you desire, you can now slot the black plactice covers over the exposed ends of the u-bolt.

The ""U"" in the part number reflects product packaged in poly bag. For additional specifications, see components and drawings tabs.
Color:  Black Powder Coat 
Ball Size:  1 Inch Rubber Ball 
Material:  Powder Coated Marine Grade Aluminum