The RAM-202U-22 contains a 1.5" diameter rubber ball connected to a 2"x2" rectangular plate with a 4-hole pattern of 1.5" x 1.5" center to center hole pattern.  The RAM-202U-22 features the RAM^® rubber ball allows for connection to any C size RAM^® double socket arm; ball and socket technology allows for near-infinite adjustability.  The RAM^® RAM-202U-22 is made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments and is backed by a lifetime warranty.