The RAM-B-166-103U consists of a 3.3" suction cup twist lock base, 1" ball diamond base and standard length double socket arm. The suction cup base is designed to have a strong hold on glass and non-porous plastic surfaces, including RAM adhesive disks. 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; this allowing for almost infinite adjustment and perfect viewing angles. The socket arm is compatible with all 1" ball bases and adapters. Material: Powder Coated Marine Grade Aluminum Ball Size:1" Rubber Ball "B" Size Weight:0.55 lbs.