About this item Complete GPS mounting kit for handlebars includes zinc-coated U-bolt base that accommodates rails from .5″ to 1.25″ in diameter, medium length B size RAM double socket arm, diamond base ball adapter, and form-fit GPS cradle ball and socket technology allows for near-infinite adjustability on bicycle and motorcycle handlebars Made of powder-coated, marine-grade aluminum and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty Compatible with Garmin Astro 320,Garmin Astro 430,Garmin GPSMAP 62,Garmin GPSMAP 62s,Garmin GPSMAP 62sc,Garmin GPSMAP 62st,Garmin GPSMAP 62stc,Garmin GPSMAP 64,Garmin GPSMAP 64s,Garmin GPSMAP 64sc,Garmin GPSMAP 64st Product Packaging:Standard Packaging The RAM-B-149Z-GA41U consists of a zinc coated u-bolt base, double socket arm and high strength composite cradle. Included in this package is hardware that will accommodate rails from 0.50″ to 1.25″ in diameter. The base includes black cover caps to be placed over the exposed ends of the u-bolt. The included composite rail adapter can narrow the rail to a minimum width of 0.5″. The mount is designed with a RAM 1″ diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles.