CGA-540 to CGA-540 Oxygen Transfill Adapter - $75.
Shipping within Continental US - $15.

For trans-filling portable oxygen tanks with CGA-540 valves from oxygen storage tanks at 2200 PSI.  Transfilling portable cylinders is a convenient and economical alternative to filling commercially. 

TA-540P

CGA-540 to CGA-540 Oxygen Transfill Adapter with  CGA 540 to 870 Accessory Yoke   for trans-filling portable oxygen tanks from large H tanks at 2200 PSI. 

$15 Shipping Continental US

CGA-540 to CGA-540 Oxygen Transfill Adapter with  CGA 540 to 870 Accessory Yoke   for trans-filling portable oxygen tanks from large H tanks at 2200 PSI. 

$15 Shipping Continental US

CGA-540 to CGA-540 Oxygen Transfill Adapter with Pressure Release Valve for trans-filling portable oxygen tanks from large H tanks at 2200 PSI.  Includes pressure release needle valve and two foot stainless steel hose.