The RAM-D-101, powder coated marine grade aluminium mount, consists of a double socket arm mount, two round bases with the universal AMPS hole pattern. The rubber ball and socket technology dampens shock and vibration, as well as allowing for almost infinite adjustment and perfect viewing angles. For most applications, mount will support up to 5kgs. Ball Size: 2.25" Rubber Ball Size Material: Powder Coated Marine Grade Aluminium Weight: 4.85 lbs. Components RAM-D-201 RAM-D-202 x 2