152T Series Two Stage RegulatorsDesigned 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. CGA346 9/16in-18RHM, Gas: Air. Forged brass body and housing cap Delrin cap bushing for smooth adjustments Self re-seating external pressure relief valve Sintered bronze inlet filter Stem-type seat assembly for more reliable performance 2in gauges for easy reading 1- 1/4in & 2in diaphragms Steel Gauge Protectors are color-coded: green for Oxygen GP21X and red for Acetylene GP21Y Weight: 4 lbs 10 oz Conforms to CGA E-4 standard for gas pressure regulators