Smith™ Oxygen Regulator 30-20-540Genuine Smith™ 30-20-540 Oxygen Regulator is designed specifically for welding or brazing applications requiring less than 20 PSIG working pressure. Outlet pressure gauge has large, easy-to-read numbers allowing for more accurate working pressure adjustments for fine welding and brazing jobs.Like all Smith 30 series regulators, the 30-20-540 is a rugged, medium duty, single stage oxygen regulator that features a nickel-plated bonnet, shatter resistant 2 inch gauges and Sure Seat™ filtered seat. It comes with Smith's 3 year regulator warranty.Made in USAFeatures Neoprene composite diaphragm Resists corrosion for extended service life. Color-coded labelSupplies performance capabilities, easy gas service identification and technical information. External relief valve Protects regulator from damage due to inadvertent high-pressure surge. Relief valve will release excessive pressure and automatically reset. Brass body and nickel-plated bonnet Protects against corrosion. Shatter-resistant 2-inch gauges Easy-to-read gauges with polycarbonate lens covers for protection. Dual filters including Sure Seat™ Protects high-pressure seat from debris for reliable operation and long service life