RAM Custom GoPro Hero Adapter with Double Socket Arm and Twist Lock Suction Cup Mount. (sku 18546)RAM Custom GoPro Hero Adapter with Double Socket Arm and Twist Lock Suction Cup Mount. RAM B 166 GOP1 The Mount consists of a 82. 5mm (3. 25") Twist Lock Suction Cup Base with a 1" diameter ball and Double Socket Arm. The GoPro Hero Adapter attaches directly to the underside of the camera, replacing the factory mounting bracket. Adjustment points at both ends of the 3 inch double socket arm allowing for optimum viewing position The rubber ball and