RAM Twist Lock Suction Cup Mount, Short Double Socket Arm & 1"" Diameter Ball with Custom GoPro Hero Adapter RAM Twist Lock Suction Cup Mount, Short Double Socket Arm & 1" Diameter Ball with Custom GoPro Hero Adapter Compatible GoPro Cameras: All HD HERO Original HD HERO2 Professional Cameras Material: High Strength Composite & 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.