Consists of a 1-inch diameter rubber ball contacted to a round plate with 1/4-inch screw for Cameras, Video, Camcorders. Our camera mount fits for universal camera and camcorder base. The 1/4-screw threaded steel stud will connect to standard female thread found on camcorders and digital cameras. This GPS mount compatible with Cameras of Contour GPS Contour HD Gobandit GPS-HD GoPro HD Helmet HERO GoPro HD Motorsports HERO GoPro HD Surf HERO GoPro,etc.Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. Please make sure you don't mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks very much

?This GPS mount is made in high quality aluminum raw material and high strength composite. ?This camera ball mount holder has 1/4-inch screw threaded steel screw fits to standard female thread found on camcorders and digital cameras. ?The round plate of the bike ball mount provides extra support and stability for cameras or phones that rest on top of it, it is very sturdy and durable. compatible with RAM/iMESTOU B ball foot arm systems. ?This camera mount consists of a 1-inch diameter rubber ball, connected to a round plate with 1/4-inch screw camera thread. ?.With this dual ball adapter mounting kit, you can 360°rotate your Gamin GPS, camera mount or phone holder device , it is suitable for outdoor riding and photo shooting.