The RAM-B-102-132U is a marine grade aluminum 2.5 inch diameter flat surface base with standard arm and composite self leveling drink holder. The RAM-B-132U includes the RAM-B-238U base, RAM-B-201U arm
and RAM-B-132BU self leveling drink holder with foam insert. 
RAM-B-101-132U shown above.
The RAM-B-102-132U Features: · Warranty: Manufacturer's, National Products Inc., Life Time Warranty
· Cup Holder Design: RAM-B-132BU composite self leveling drink holder with foam insert.
· Mount Material: Black powder coated marine grade aluminum.
· Mount Ball Size: 1 inch solid rubber ball.
· Arm Type: RAM-B-201U standard length arm with dual 1 inch sockets.
· Arm Length: Standard arm length of 2.875 inches between socket centers.
· Base Type: RAM-B-238U 1.25 inches * 2.5 inches marine grade aluminum universal diamond plate with two pre-drilled holes. The two holes are positioned 1.9 inches from center to center. The base has a 1 inch diameter rubber ball that connects to the RAM-B-201U arm and allows the arm to be positioned in a variety of mounting angles. Mounting hardware is not included.
The RAM-KNOB-3LU is a popular option that locks the arm assembly in place.
