Our Grow1 CO2 Regulator is the perfect tool to help you control and maintain your optimum CO2 levels for your plants. It has an easy-to-adjust flow meter (adjustable to 0.5 - 15 cubit feet per hour) a pre-set regulator and a solenoid valve. Easily attach the included tubing to a fan for even CO2 distribution throughout your grow room. Includes a 6 ft long 120V power cord 5 meters of 1/4'' black tubing and 2 white washers.