Composite C-Clam Mount Description:
RAM Composite Clamp Mount with Universal Finger Grip&trade   cradle. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality composite materials insure your device is safe, secure, and within easy reach. The clamp base fits a rail or edge lip from 0.625" to a maximum of 1.25". The mounting base can also accept a second ball giving you the ultimate double ball base. Extra ball not included with purchase of this mount. 

Universal Finger Grip&trade  cradle Description:
The RAM Composite Universal Finger Grip&trade  cradle is designed to hold a large amount of cell phones and electronic devices. The holder comes with (3 sets) of four flexible rubber coated fingers placed along sides to grip your device. The fingers open by squeezing the ends to open the small finger arms. The bottom of the holder includes a back plate that adds support to the device being held by the mount.

Clamp Dimensions:
Fits rails or edge lips from 0.625" to a maximum of 1.25" 

Height Dimensions:
Minimum with Top and Bottom Plates: 5.25"
Maximum with Top and Bottom Plates: 6.0"
The top and bottom plates can be removed for larger devices.

Spine Plate Dimensions: 
2.5W x 5.0H"

Using Short Arm Side Clamps:
Maximum Depth: 0.75"
Minimum Width: 1.25"
Maximum Width: 3.0"

Using Medium Arm Side Clamps:
Maximum Depth: 1.25"
Minimum Width: 1.5"
Maximum Width: 3.5"

Using Long Arm Side Clamps:
Maximum Depth: 1.6"
Minimum Width: 2.25"
Maximum Width: 3.5" 

Material:
High Strength Composite and Powder Coated Marine Grade Aluminum 

Ball Size: 
1" Rubber Ball "B" Size 

Note:
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.