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5" diameter ball adapters
The RAM-B-138-TAB4-225B2U consists of a 2
The RAM-B-189-TAB8-ALA1U consists of a double 3
The RAM-B-166U consists of a 3
A complete list of compatible devices can be found below in the compatibility section
RAM® Ball Mount with Round AMPS Plate and Large Round Plate - Medium RAM-B-231NHU 5" diameter ball adaptersThe RAM D 101 254U consists of a 3. 68" diameter round base, STANDARD length double socket arm and 2. 43" diameter round base. The 3. 68" diameter round base has pre drilled holes, including two holes at 180 degrees and three holes at 120 degrees. The 2. 43" diameter round base contains the universal AMPs hole pattern. Designed into the mount is a 2. 25" diameter patented rubber ball and socket system with adjustment points at both socket ends of the