UPAQUA Brass Co2 Regulator with Solenoid Full Brass Body with Pressure Valve Easy assembling Extremely precise needle valve assures accuracy and reliability in dosing the CO2. Strict quality control assures the best quality. Safety valve prevents any accidents if overpressure occurs. Two gauges: one shows the internal pressure (amount of CO2), the other shows the released pressure to the aquarium. With Magnetic Solenoid Valve
