RAM Mount Composite Twist Lock Suction Cup w/Double Socket Arm & Double Base Adapter [RAP-B-166U]RAM Composite Twist Lock Suction Cup with Double Socket Arm and Diamond Base Adapter The RAP B 166U consists of a double socket arm, 3. 25" suction cup twist lock base and diamond base adapter. The suction cup base is designed to have a strong hold on glass and non porous plastic surfaces, including RAM adhesive disks. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the