RAM Fishfinder Mount for Humminbird Devices (RAM-107U) (sku 54465)The RAM 107U consists of a double socket arm, 2. 5" diameter round base with the universal AMPS hole pattern and connecting Humminbird Apelco marine adapter base. The mount is designed with a RAM 1. 5" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; thus allowing for almost infinite adjustment and perfect viewing angles. Rubber ball and socket technology allows for almost infinite