The Model 355-2 incorporates a regulator and flowmeter into one compact unit. The flow tube and float are easily changed for different gases. As supplied, the flow tube has dual calibration. It includes a sensitive needle valve for finger-tip control. -- Up to 140 SCFH -- Pressure Regulation: N/A -- Gauges: 1.5" Steel -- One-piece encapsulated seat design with internal filter and PTFE Teflon® seat. -- 7 Year Warranty -- Made in the USA -- -- Brass body -- Gas-shielded welding and other industrial applications -- UL® listed; CGA E-4