Made of high quality aluminum alloy and rubber, durable and firm, shockproof and stable. Small shape and compact size, it's easy and convenient for us to take and carry. Suitable for outdoor activities, travel and so on. Easy and convenient to install and remove. It is suitable for Garmin Zumo 400/450/500/550/660, for TomTom Rider 2 / for TomTom Urban Rider GPS navigation holder, for RAM MOUNT, for motorcycle or bicycle holder. 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 Mount 1"/25mm mounting arms and compatible with all industry standard 1"/25mm mount compatibles Weapons. 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!

5.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks very much!. 4.Please allow 1-3mm error due to manual measurement. Please make sure you don't mind before you bid. 3.It is suitable for Garmin Zumo 400/450/500/550/660, for TomTom Rider 2 / for TomTom Urban Rider GPS navigation holder, for RAM MOUNT, for motorcycle or bicycle holder. 2.Ball mounts perpendicular to a 2" x 1.7" round base, constructed from solid marine grade aluminum with rubber coated ball joints. 1.Consists of a 1" diameter ball and a rubber covered.