Material: Aluminium Ball Adapter for Never Breaking! Size: 1" inch ball base adapter suitable for motorcycle phone holders with 1" ball sockets. Fits: it fits to handlebar phone mounts with 0.86"-1"-1.26" diameters; or universally fits to rear-view mirror poles. Compatibility: it's compatible with RAM MOUNTS or iMESTOU bike phone holders with 1" ball sockets. What's in the Package: 1* 1" handlebar ball adapter; 1* rubber gasket for 1" handlebar; 1* gasket or 0.86" handlebar; 1* gasket for 0.47" rear-view mirror pole. Aluminium 1" Handlebar Ball Adapters Compatible with Ram/iMESTOU Phone Mounts with 1" Ball Sockets