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 cupbase is designed to have a strong hold on glass and non-porous plasticsurfaces, including RAM adhesive disks. The mount is designed with a RAM 1″diameter patented rubber ball and socket system that has adjustment points atboth ends of the double socket arm; this allowing for almost infiniteadjustment and perfect viewing angles. The hole pattern found on the diamondbase adapter will connect to most RAM cradles. 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 Components RAM-B-224-1U RAM-B-201U RAM-B-238U Hardware Included Assembly Hardware Product Dimensions Overall Height: 6.69″ Suction Size 3.3″ Diameter Socket-to-Socket Length 3″ Hole Pattern 2-Hole AMPS: 1.912″ Plate Size 2.43″ x 1.31″ Ball/Socket Size B Size (1″) Weight Capacity 2 lbs Materials Marine-grade aluminum High strength composite Weight .6 lbs