The RAM-B-121-C-238U consists of a yoke clamp base, LONG length double socket arm and 2.43" x 1.31" diamond base. The yoke clamp base will fit rails in diameter from 0.625" to a maximum of 1.25". The 1" rubber ball is at a right angle to the plane of the mount; when connected to a rail, the ball sits parallel to the rail. The diamond base has two holes 1.912" from center to center, matches the industry standard AMPS hole pattern and will connect to a large variety of RAM Mount and third party cradles. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm, allowing for almost infinite adjustment and perfect viewing angles.

Clamp Base Dimensions:
Accommodates rails from 0.625" to 1.25" in diameter

Material: 
High Strength Composite and Powder Coated Marine Grade Aluminum 

Ball Size:
1" Rubber "B" Ball Size 

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