The RAM-B-166-GA47 consists of a double socket arm, 3.25″ twist lock suction cup base, diamond adapter base and custom high strength composite cradle for the Garmin Rino 600 series. The suction cup, twist lock base is designed to have a strong hold on glass and non-porous plastic surfaces, including RAM adhesive disks. Designed into the mount is a 1″ diameter patented rubber ball and socket system with adjustment points at the base and cradle. With a twist of the arm knob, you can move the Rino suction cup mount to your optimum viewing position. This mount is designed to hold the following devices: Garmin Rino 610 Garmin Rino 650 Garmin Rino 655t Material: High Strength Composite and Powder Coated Marine Grade AluminumBall Size: 1″ Rubber Ball „B” Size Note: Part number reflects product packaged in clear clam shell for store shelf display. Related Links:Garmin Rino New Products PageRAM GPS Mounts Page.