Ordering Description Product number Description: HYTS 2537-580 Regulator/Flowmeter Combination - Argon/Helium Product number: 0781-3772 Description: HVTS 2570-580 Regulator/Flowmeter Combination - Argon/Argon, CO2 Mix/Helium Product number: 0781-3774 Description: HVTS 2537-580 Regulator/Flowmeter Combination - Argon/HeliumSingle & Two Stage Product number: 0781-3775 Description: HSR 2530-580 Regulator/Flowmeter Combination - Nitrogen/Air, Inert Gas Product number: 0781-3819 Description: HSR 2533-580 Regulator/Flowmeter Combination - Fuel Gas, Hydogen Product number: 0781-3825 Description: HSR 2535-580 Regulator/Flowmeter Combination - Argon/HeliumSingle & Two Stage Product number: 0781-3867 Description: Victor Professional Single Stage Flow Meter HSR 2570, Medium Duty, 25 PSIG - Preset, 320 Product number: 0781-3869 Description: HSR 2537-580 Regulator/Flowmeter Combination - Argon/HeliumSingle & Two Stage Product number: 0781-3871 Description: HSR 2570-580 Regulator/Flowmeter Combination - Argon/Argon CO2 Mix/Helium Product number: 0781-3873 Description: Victor Professional Single Stage Flow Meter HSR 1470, Light Duty, 25 PSIG - Preset, 680 Product number: 0781-3880