RAM Yoke Clamp Base with 1" Rubber Ball
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.
Powder Coated Marine Grade Aluminum
1" Rubber Ball "B" Size
The "U" in the part number reflects product packaged in poly bag. The rail does not need to be perfectly round to mount this base.