RAM® Composite Ball Adapter with AMPS Plate

The RAP-B-347U base consists of a 1" (25.4 mm) diameter rubber ball connected at right angles to a 2" (50.8 mm) x 1.7" (43.2 mm) square base. The base has four pre-drilled holes at each corner, making the universal 1.5 x 1.188 (hole spacing) AMPS hole pattern.