Round base, 1 in.
6.35 cm (2.5 in.), AMPS + 120°, 1 in, ball (size B), composite - RAP-B-202U
This round base is a good foundation for your individual RAM Mount system.
This base has a diameter of 6.35 cm (2.5″) and has four holes in industry standard AMPS (rectangular array, 30×38 mm) and three holes in 120-degree angle. The base may also be used for attachment of device carriers without ball (see description of that products).