RAM 2" x 4" Rectangle Base w/1" Ball The RAM-B-202U-24 contains a 1" diameter rubber ball connected at right angles to a 2" x 4" rectangular base. This mount has pre-drilled holes at each corner of the base plate. Material: Powder Coated Marine Grade Aluminum Ball Size: 1" Rubber Ball "B" Size Note: The "U" in the part number reflects product packaged in poly bag. Mounting hardware not included with purchase.