ONE PIECE OXYGEN TRANSFILL ADAPTOR - CGA540 LARGE TANK to CGA870 SMALL TANK Compact and simple oxygen transfill adaptor allows transfilling of oxygen from large K,T,H tanks with CGA 540 male threaded valves to small portable CGA 870 pin index oxygen cylinders. This high quality chrome plated transfill includes an easy to read oxygen contents gauge and bleed valve for easy purging of gas after the transfill process is complete. Chrome Plated Machined Brass Construction, Robust Design CGA 540 Cylinder nut CGA 870 Pin Indexed Medical Yoke Connection Large Cylinder Contents Gauge Bleed Assembly NOTE: CYLINDERS NOT INCLUDED