Rugged medium-duty industrial-grade regulators are extremely durable and contain Smith’s exclusive Sure Seat™ filtered seat technology for extended seat and regulator life|Flow Gauge and Flowmeter Regulators|Use for shielding gas with argon or CO2 in MIG and TIG welding|Flow gauge regulators are for accurate measurement of gas flow|Flowmeter regulators incorporate flowmeter and regulator into one compact unit