CGA-540 TO CGA-540 Oxygen Transfill Adapter for filling portable oxygen tanks with CGA-540 valves from oxgyen storage tanks at 2200 PSI.  Convenient and economical!

Features:
        All parts are rated at 3000 PSI.
        All parts are new and cleaned for oxygen service.
        Pigtail is a 2 ft. high-pressure braided stainless steel flexible hose
        Check valve eliminates tank contamination