Ordering Description Product number Description: ESS42-60-540, Oxygen Product number: 0781-3600 Description: ESS42-150-540, Oxygen Product number: 0781-3601 Description: ESS42-150-346, Air Product number: 0781-3613 Description: ESS42-150-590, Industrial Air Product number: 0781-3614 Description: ESS42-150-580, Inert Product number: 0781-3609 Description: ESS42-150-320, Carbon Dioxide Product number: 0781-3615 Description: ESS42-150-350, Methane/Hydrogen Product number: 0781-3612 Description: ESS42-15-510, Acetylene Product number: 0781-3602 Description: ESS42-15-300, Acetylene Product number: 0781-3603 Description: ESS42-15-993, Acetylene Product number: 0781-3604 Description: ESS42-15-410, Acetylene Product number: 0781-3605 Description: ESS42-60-510LP, LP Gas Product number: 0781-3606 Description: ESS42-150-510LP, LP Gas Product number: 0781-3607