Ordering Description Product number Description: Victor EDGE EHP3-400-580 Inert Gas Regulator Product number: 0781-5167 Description: Victor EDGE EHP3-400-680 Inert Gas Regulator Product number: 0781-5168 Description: Victor EDGE EHP3-800-580 Inert Gas Regulator Product number: 0781-5171 Description: Victor EDGE EHP3-400-347 Air Regulator Product number: 0781-5169 Description: Victor EDGE EHP3-800-540 Oxygen Regulator Product number: 0781-5170