Ordering Description Product number Description: Victor Heavy Duty G Series, Single Stage, G350 Regulator, 150-540, Oxygen Product number: 0781-9415 Description: Victor Heavy Duty G Series, Single Stage, G350 Regulator, 15-510, Acetylene Product number: 0781-9420 Description: Victor Heavy Duty G Series, Single Stage, G350 Regulator, 15-300, Acetylene Product number: 0781-9421 Description: Victor Heavy Duty G Series, Single Stage, G350 Regulator, 150-580, Inert Product number: 0781-9416 Description: Victor Heavy Duty G Series, Single Stage, G350 Regulator, 60-510 L.P., L.P. Product number: 0781-9422