Smith™ Flowmeter Regulator H2051B-580Genuine Smith™ H2051B-580 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.Features: Shatter-resistant polycarbonate flow tube High visibility red flow meter ball Triple Scale measures Argon, Helium, CO2 and Argon/CO2 Precision flow adjustment valve locks at desired setting Packless "O" ring flow tube seal reduces maintenance Protective inlet filter guards against impurities 100% tested and inspected Three Year Warranty