PowerPod Grand Prix Series with 20/40 Base Choice of 20 or 40 degrees tilt angle Allows left to right swivel action Features: Versatile 20/40 Swivel Base Choice of 20 or 40 degree tilt angle: 20 degrees for on-dash mounting, 40 degrees for overhead mounting Allows left-to-right swivel action for the best viewing angle for your electronics Double layered material thickness for added strength Super Strong Swivel Tube Internal swivel mechanism made of a reinforced nylon composite for strength and reliability Approved for overhead mounting of PowerPods Large 1.875" inside diameter allows for plenty of wiring/cabling to pass through Extra Large Swivel Washer 5" Teflon and EPDM rubber swivel washers between the base and back to provide smooth swivel action and wide distribution of load to eliminate vibration The Latest In Industrial Design Built to complement the latest marine electronic products. Double Seal for Watertight Integrity Outer silicone seal is complemented by an internal seal made of memory resistant urethane foam gasketing that keeps its shape and sealing ability over many years. Polished Stainless Steel TamperProof Fasteners Large size and strength with new buttonhead style screws that have deep wrench recesses for better tightening power. UV stable polyurethane washers under each fastener improves sealing and holding power of fasteners and long 6" tamperproof wrench provided for easier assembly.