Miller® Smith® flowmeter/regulator provides precise shielding gas regulation for MIG and TIG welding applications. Shatter resistant polycarbonate flow tube features triple scale for Argon, Helium and Argon/CO2 and has a packless O-ring flow tube seal, which reduces maintenance. Built-in rupture disc reduces possibility of flow tube damage due to high pressure inlet surge. Precision flow adjustment valve locks flow at desired setting.