The RAM GoPro HERO flat surface mount consists of a 2.5" diameter round base with the universal AMPS hole pattern, short size double socket arm, and 1" diameter ball with custom GoPro Hero adapter. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allows for almost infinite adjustment and perfect viewing angles. Compatible with all HD HERO Original + HD HERO2 professional cameras. Constructed from high strength composite and powder-coated marine-grade aluminum. 1" rubber ball "B" size. Adjustment points at both ends of arm High strength composite construction | Mount GoPro HERO Flat Surface Mount