247Garden CO2 Regulator with Solenoid Valve 110V, Forged Brass Body, Nylon Washer, 4000 PSI Pressure Gauge, 0.5-15 SCFH Compatible for Indoor Gardening, Hydroponics, Beer Brewing 247Garden CO2 Regulator w/Solenoid Valve 110V, Forged Brass Body, Nylon Washer, 4000 PSI Pressure Gauge, 0.5-15 SCFH Compatiable for Indoor Gardening & Hydroponics, Beer & Wine Kegs Brewing Forged brass body and bonnet for maximum strength with 4000 PSI pressure gauge. Safety relief valve is set for safe operation Sintered metal inlet filter to trap impurities w/ nylon washer included. No soldered joints for easy maintenance. 100% Customer Satisfaction Guaranteed.