RAM Mount Flat Surface Mount w/1" Ball, including M6 X 30 SS HEX Head Bolt, f/Raymarine Dragonfly-4/5 WiFish Devices [RAM-B-202-379-M616U]Flat Surface Mount w 1" Ball, including M6 X 30 SS HEX Head Bolt, f Raymarine Dragonfly 4 5 & WiFish Devices The RAM B 202 379 M616U consists of a 2. 5" diameter round base with the universal AMPS hole pattern, STANDARD size double socket arm and 1" diameter ball, containing a M6 x 30 SS HEX head bolt. 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;