RAM 1″ Diameter Ball Mount with 2/2.5″ Round Bases & Mounting Hardware for Garmin Fishfinders & GPSMAP Devices The RAM-B-101-G2U consists of a double socket arm and two 2.5″ diameter round bases with the universal AMPS hole pattern. Designed into the mount is a 1″ diameter patented rubber ball and socket system with adjustment points [...]