Smith Equipment MILLER-SMITH Flowmeter Regulators Built-in rupture disc reduces possibility of flow tube damage due to high pressure inlet surge. Exceptional value and compact design, provides precise shield gas regulation for MIG and TIG welding applications and more. Precision flow adjustment valve locks flow at desired setting. Shatter- polycarbonate flow tube features triple scale for Argon, Helium and Argon/CO2 and has a packless O-ring flow tube seal which reduces maintenance. Pack of 1