GROW1 CO2 Grow Room Environment Regulator Flow Meter Solenoid - 6 ft long 13-prong grounded power cord and plug to 120V, 60Hz household outlet - Solenoid valve (precise 0.5-15 CFH settings) - Pressure gauge, brass alloy body, tank pressure gauge - 5 meter long black 1/4" tubing - 2 plastic white washers