Tough reinforced plastic housing. Outlet flange mounts directly on bulkhead. Mount to any surface. Slip-on inlet ducting connection. Low current draw. Efficient high volume airflow. Dimensionally stable quiet running Delrin rotors. Corrosion resistant materials throughout. Complies with USCG 183.410 and ISO 8846 MARINE (Ignition Protection). N.M.M.A. Type Accepted. ISO 9097 MARINE (Electric Fans).