Brass regulator valve with neoprene diaphragm reduces pressure from the gas cylinderto a safe working pressure. The inlet gauge on the right (0 to 17,250kPa/0 to 2,500psig)monitors the cylinder pressure while the gauge on the left (0 to 207 kPa/0 to 30 psig)monitors and sets the delivery pressure desired from 14 to 103kPa/2 to 15psig. WithCGA 170 swivel inlet connection and angled male outlet valve, 1/8" NPT with matinghose connection. Operating temperature range is -30 to 60°C. Size: 6" x 4" x 4".