This motorcycle mount makes attaching to handlebars, tubing, or railing a breeze. Simple to install and easy to use, the possibilities become endless. The zinc coated metal u-bolt and nuts included are designed it fit motorcycle handlebars, or circular rail that are 0.50″ to 1.25″ in diameter. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials insure your GPS is safe, secure, and within easy reach. RAM’s patented design also dampens shock and vibration helping to extend the life of your mobile device. This mount is designed to hold the following devices: Garmin StreetPilot c310 Garmin StreetPilot c320 Garmin StreetPilot c330 Garmin StreetPilot c340 Material: Powder Coated Marine Grade Aluminum Ball Size: 1″ Rubber Ball „B” Size Note: The „U” in the part number reflects product packaged in poly bag. This mount does not include the power adaptor but will accept the Garmin factory power adaptor from the original mounting system. The cradle does not block the internal antenna or speaker and allows for use of the factory 12V power adaptor. Utilizing a 1″ rubber ball, this cradle seamlessly integrates into any of the RAM compatible mounts. Related Links:RAM GPS Mounts PageRAM Motorcycle Mounts Page.