Smith Equipment 2 stage acetylene regulator. Model # 35-15-510 Drop cylinder pressure to working pressure in two stages for consistent and accurate outlet pressure and flow regardless of inlet pressure. Recommended where outlet pressure and flow must be maintained without variation. 2 Stage ACETYLENE regulator Delivery Pressure 0-15 PSIG 2″ Gauges Inlet 400 PSIG Outlet 30 PSIG Inlet Connection CGA 510 Outlet Connection (“B”) 9/16″ – 18 LH UL Listed Max Inlet Pressure 400 PSIG 3 Year Warranty