The RAM-101U-225, powder coated marine grade aluminum mount, consists of a 6 inch double socket arm, one round 2.5" diameter round base with the universal AMPS hole pattern and one 2" x 2.5" rectangular base. Rubber ball, socket technology dampens shock and vibration, as well as allows for almost infinite adjustment, perfect viewing angles. For most applications, mount will support up to 4 pounds.