Designed for medium duty gas welding, cutting and heating applications, these two-stage regulators provide precise and constant delivery over a wide range of inlet pressures. Ideal for laboratory, welding, cutting and many other applications. Body and housing cap are machined from class “A” brass bar stock Delrin cap bushing for smooth adjustments Self re-seating external safety pressure relief valve Sintered bronze inlet filter Stem type seat assembly for more reliable performance 2" gauges for easy reading 1-1/4" & 2" diaphragms Weight: 4 lbs 10 oz Conforms to CGA E-4 standard for gas pressure regulators