The RAM-B-166-SPO3 consists of a double socket arm, 3.25″ twist lock suction cup base, diamond adapter base and custom high strength composite cradle for the SPOT Connect and Satellite Communicator . 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 SPOT suction cup mount to your optimum viewing position. This mount is designed to hold the following devices: SPOT Connect SPOT Satellite CommunicatorMaterial: 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:SPOT Connect & Communicator New Products PageRAM GPS Mounts Page.