Gauge CO2 Regulator with Solenoid Valve and Bubble Counter, Aquarium Pressure
Fire Extinguisher NOT INCLUDED. Gauge CO2 Regulator with Solenoid Valve and Bubble Counter, Aquarium Pressure Reducer, W21.8 Interface. Mufan CO2 Regulator + Solenoid Valve W21.8 UK Aquarium - Fits Fire Extinguishers.