RAM Mount 1" Ball Marine Electronics Mount w/Diamond Base [RAM-B-107U-238]1" Ball Marine Electronics Mount with Diamond Base The RAM B 107U 238 consists of a double socket arm, diamond base and connecting Humminbird Apelco marine base. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both socket ends of the arm. The diamond base contains two holes 1. 912" from center to center, positioned at both ends of the base. Rubber ball and socket technology allows for almost