1 inch ball mount base ball adapter consists of a 1" diameter ball and a rubber joint. Ball mounts perpendicular to a 2" x 1.7" round base, constructed from solid marine grade aluminum with rubber coated ball joints, compatible with RAM Mounts 1"/25mm mounting arms and compatible with all industry standard 1"/25mm mount. There are four pre-drilled holes in each corner of the base. Universal 1.5 x 1.188 (hole spacing) hole pattern, typically compatible with RAM mounts and other industry standard 25mm/1" dual ball sockets/arms. Features: 30 x 38mm industry standard (=AMPS) 4-hole pattern, compatible with all industry standard AMPS twists The adapter plate is used with vehicle specific mounts, motorcycle navigation, car gps navigation. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. Make sure you don't mind before you bid. Due to differences between different monitors, pictures may not reflect the actual color of the item. Thank you very much! The package includes: 1 x Ball Round Mounting Base

Easy Installation: Simply attach suction cups to handlebars or mirrors and place your device in the holder. Versatile Use: Can be used with smartphones, cameras, tablets and more on your motorcycle. Secure Mounting: Suction cups provide a secure hold on handlebars or rearview mirrors. Durable Construction: Made from thermoplastic polyurethane and aluminum for water resistance and durability. Universal Compatibility: Fits 1 inch double socket arms for use with Ram Mounts phone holders.