The RAM-B-166U consists of a 3.3 diameter suction cup twist lock base, STANDARD length double socket arm and diamond base adapter. 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 hole pattern found on the diamond base adapter will connect to most RAM cradles. Product Features: RAM® Twist-Lock™ suction cup base is ideal for vehicle windshields and other nonporous surfaces Includes B size medium length RAM® double socket arm and diamond bases with B size 1 rubber balls; ball and socket technology allows for near-infinite adjustability Made of powder-coated, marine-grade aluminum and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty Backed by a lifetime warranty*