The RAM-B-102, universal marine grade aluminium mount consists of two universal diamond plates and a standard B size arm. The hole pattern found on the diamond plate will connect to many RAM holders, as well as third party holders including mounts with the industry standard AMPS hole pattern. Designed into the mount is a 1" diameter patented rubber ball and socket system with an adjustment point at the base and holder. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. Ball Size: 1" Rubber "B" Ball Size Material: Powder Coated Marine Grade Aluminium Components RAM-B-201 RAM-B-238 x 2 TIP: The small footprint of a RAM diamond base makes this type of mount suitable for use in aircraft cockpits, like Cessnas and Pipers, where space is at a premium. Just add a RAM holder to complete the mount.