Turn any cup holder into a RAM mount with the RAM-A-CAN II Universal Cup Holder Base w. Double Ball Mount. KEY FEATURES Made of High Strength Composite Fits cup holders between 2.57" - 3.5" inside diameter Comes with Assembly hardware Mounting Point for RAM Diamond Base The RAP-299-3-B-102U consists of a double socket arm, two diamond bases and RAM-A-CAN™ II cup holder base. The diamond bases measure 2.43" x 1.31" diamond base and contain two holes 1.912" from center to center, positioned at both ends of the diamond base. The hole pattern found on the diamond bases will connect to many RAM cradles, as well as third party cradles including mounts with the industry standard AMPS hole pattern. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both socket-ends of the arm. The RAM-A-CAN™ II cup holder base serves as a mounting point for the diamond base. Compatible with any vehicle cup holder with an inside diameter range of 2.57" to 3.5"