The RAM-B-202U consists of a B size rubber ball connected to a 64mm diameter round plate. This mounting component includes pre-drilled holes using the universal AMPS hole pattern.
4-Hole AMPS: 30mm x 38mm
3-Hole 120-Degree: 46mm Diameter
Ø 64mm diameter
B Size Ball : 2.54 cm (1") in diameter (generally used to support a load of 0-2 kg)
Marine-grade aluminium