Pre-Cut for Simrad NSS 12. Double seal for watertight integrity. 20 or 40 degrees tilt angle for on-dash mounting. Internal swivel mechanism made of reinforced nylon. Outer silicone seal is complemented by an internal seal made of memory resistant urethane foam gasketing that keeps its shape and sealing ability. Built to complement the latest in Marine Technology. PowerPods are simply a better way to mount your Radar/Chartplotter, Fishfinder or GPS.