The RAM suction mounting bracket for the Garmin eTrex 10/20/30 Series uses twist to lock suction base with a 1” ball, a 2.47” double socket arm and a cradle specifically designed to fit the Garmin eTrex 10/20/30 Series models. The rubber ball and socket design allows almost infinite adjustment so you can view it from any angle. Mount it to the glass on your boat, vehicle or golf cart; this mount will hold up on any adventure. The mount is made of a high strength composite material, is ultra durable, dampens shock and vibration, and comes with a Lifetime Warranty. RAM mounts are Made in the USA.