CGA-540 TO CGA-540 Oxygen Transfill Adapter with Gauge and Pressure Release Valve  for trans-filling portable oxygen tanks from large H tanks at 2200 PSI.

Features:
        All parts are rated to 3000 PSI.
        All parts are new and cleaned for oxygen service.
        Pigtail is a 2 ft. high-pressure braided stainless steel flexible hose
        Pressure release needle valve for added safety and convenience
        Supply ends are CGA-540 female
        Check valve eliminates tank contamination

        $15 Shipping Continental US