The Latest in Industrial Design Built to complement the latest in marine electronics. 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 for many years. Polished Stainless Steel TamperProof Fasteners Buttonhead style screws have deep wrench recesses for better tightening power. UV stable polyurethane washers under each fastener improves sealing and holding power of fasteners. A long 6" tamperproof wrench is provided for easier assembly. Un-Cut Models Available in flush front that is easier to cut into with handheld cutters or recess front models that protect edges of electronics once they are mounted within.