The RAM-B-182-AP9U consists of a brake/clutch reservoir cover base (1″ ball centered), double socket arm, diamond adapter base and high strength composite cradle for the Apple iPhone 4. The base fits cleanly over your existing reservoir cover, with the 1″ rubber ball centered on a die cast aluminum plate, both form and function are unsurpassed. Installation is simple and all necessary hardware is included. This mount is designed to hold the following devices: Apple iPhone 4 WITHOUT Bumper, Skin or Case Apple iPhone 4S WITHOUT Bumper, Skin or CaseMaterial: High Strength Composite and Powder Coated Marine Grade Aluminum Ball Size: 1″ Rubber Ball „B” Size Note: The „U” in the part number reflects product packaged in poly bag. This mount will NOT hold the 1st generation Apple iPhone, iPhone 3G, iPhone 3G S or iPhone WITH bumper, skin or case. Related Links:Compatible MotorcyclesBrake/Clutch Reservoir Cover (Ball Centered) Installation InstructionsApple iPhone 4S New Products PageRAM Motorcycle Mounts PageRAM Apple Mounts PageImage Gallery.