BiG DIGITAL Roll Bar Mount The mount fits on any parts ranging from 1.4-2.5" in diameter, For GoPro HERO, HERO4, HERO3+, Hero3, HERO2 Black, Silver, White, Motorsports, Outdoor, Surf, Edition !!! The Roll Bar Mount attaches your Digital HERO video camera to cars, boats, ATVs, and just about any other vehicle you can think of. Capture all the action from a whole new point of view. Fits around any bar from 1.4" to 2.5" (3.5cm - 6.35cm) in diameter, allowing virtually countless angles to shoot from. You and your friends will be blown away by the footage the Roll Bar Mount lets you capture. Features orientation adjustment mounts for various positions This mount is easy to use, goes on in seconds and holds well.