1" Ball Mount with Custom GoPro; Hero AdapterThe RAM-B-138-GOP1U consists of a 2.5" diameter round base with the universal AMPS hole pattern, STANDARD size double socket arm and 1" diameter ball with custom GoPror Hero adapter. 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 RAM-B-138-GOP1 can be used as a drill-down or a temporary, removable mounting solution with the addition of the RAP-339U accessory. The GoPror Hero adapter attaches directly to the under-side of the camera, replacing the factory mounting bracket. Material: High Strength Composite & Powder Coated Marine Grade AluminumBall Size: 1" Rubber Ball "B" Size Note: The "U" in the part number reflects product packaged in poly bag. GoPro camera and black thumb screw not included with purchase. | Mount 1" Ball Mount w/ Custom GoPro; Hero Adapter in Black