40020: High Altitude Pressure Suit Portable Ventilating
High Altitude Pressure Suit Portable Ventilating Unit. Bright yellow. As used by pilots when on the ground and not connected to the plane's ventilation system. Approximately 12" x 12" x 8" in size. Metal plate on top states the maker as Heat Exchangers, Inc. of Skokie, Illinois. Full instructions on metal plate at one end. Hose attached. Excellent condition.