The RAM-B-347U base consists of a B size 1" / 25 mm diameter rubber ball connected to a 2" x 1.7" square base. The base has four pre-drilled holes at each corner, using the universal AMPS hole pattern. Features 2" x 1.7" / 50 x 43 mm square ball base features industry-standard AMPS hole pattern with four pre-drilled holes at each corner Included B size 1" / 25 mm RAM® rubber ball allows for connection to any B size RAM® double socket arm, ball & socket technology allows for near-infinite adjustability made from powder-coated, marine-grade aluminum for durability & reliability in the most demanding environments
Dimensions Hole pattern 4-hole AMPS: 1.181" x 1.496" / 3.0 x 3.8 cm B size Ball 1" / 25 mm 2" x 1.7" / 50 x 43 mm square ball base Weight Capacity Standard use: 2 lbs / 900 gr. Heavy-duty use: 1 lb / 450 gr.