Check the listing for details. Oxygen Homefill Transfill Hose to CGA-540 Oxygen Tank. Condition: New. Listed at 72.95 USD. Oxygen Machine Special Filling Transfill Adaptor Hose Assembly Connect one end to your machine - Connect other end to your small oxygen CGA540 cylinder. -Filling your own home produced oxygen into standard oxygen tanks - CGA540 -Good for filling medical grade oxygen and welding and brazing grade oxygen. -3000PSI Oxygen Hose, Pressure Gauge, CGA-540 x Special "NEW" Homefill adaptor check valve 36" Oxygen transfill assembly allows you to fill you own oxygen H tanks (CGA-540) from your Oxygen Machine. One end of the device plugs into the port where you would normally plug in your special Homefill oxygen tank and the other end attaches to an H tank (or any CGA-540 tank) with the 36" hose. IMPORTANT ******* CLEANED FOR OXYGEN SERVICE - DETAILED INSTRUCTIONS INCLUDED - BE SURE TO READ AND FOLLOW ALL INSTRUCTIONS TO SAFELY TRANFILL OXYGEN - DO NOT USE OIL OR CONTAMINATE ANY PARTS TO BE USED IN OXYGEN - RISK OF SERIOUS INJURY IF DIRECTIONS NOT FOLLOWED PRECISELY.*****