The RAM-B-138U consists of a 2. 5 in. diameter round base that contains the universal AMPs hole pattern, double socket arm and diamond base adapter.
RAM X-Grip III Large Tablet Holder w/ Long Flat Surface Mount - Yahoo Shopping
The RAM-B-101U-C-A consists of a long length B-size arm with a 2.5 diameter round plate with universal AMPS hole pattern as well as a 2.5 diameter round plate with universal AMPS hole pattern and a removable 1/4-20 threaded post.
Ram Double Ball Mount with 1/4-20 male Thread - RAM-B-101U-C-A
RAM X-Grip III Large Tablet Holder w/ Long Flat Surface Mount - Yahoo Shopping
RAM Mount B-Size Balls, RAM Mount 1 Inch Balls
RAM Mount B-Size Balls, RAM Mount 1 Inch Balls
Have a question about RAM MOUNTS Ram Flat Surface Mount With Universal X-Grip Cradle With 1 in. Ball for 7 in. Tablets? - Pg 1 - The Home Depot
RAM-B-101U Ram Mount 1 Ball Double Socket Arm w/2 2.5 Round Bases
The RAM-B-138U consists of a 2.5 diameter round base that contains the universal AMPs hole pattern, double socket arm and diamond base adapter. The mount is designed with a 1 diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm this allowing for almost infinite adjustment and perfect viewing angles. The hole pattern found on the diamond base adapter will connect to most RAM cradles.
Ram RAM-B-138U - Mount
RAM-B-101U Ram Mount 1 Ball Double Socket Arm w/2 2.5 Round Bases