A rear cap for a port (except for Front Port) and Extension Ring. When transporting or during storage, this cap protects O-ring and screw mount. The cap is designed to equalize with ambient pressure when transporting in an aircraft.
Port O-ring protection during transportation or storage. The MF Rear Port Cap is compatible with all INON ports. Pressure relief construction to equalize pressure inside of the port to the outer pressure is useful when travelling air.