New CO2 Regulator (DUAL) 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. Included: 6 ft long 120V power cord 5 meters of 1/4" black tubing 2 white washers Dual CO2 Regulator/Emitter will allow you to maintain ideal CO2 levels for optimum growth. It features an accurate, easy-to-adjust CO2 flow meter, a pre-set regulator that never needs adjusting, and a solenoid valve. Each unit also comes with the tubing needed to disperse the CO2 evenly throughout your room by attaching the tubing to the back of an oscillating fan for even dispersion. The flow rate is adjustable from .5 ? 15 Cubic Feet Per Hour. Will run 2 CO2 tanks at the same time for maximum times between fills Easy to use Flexible .5-15 cubic feet per hour settings Fully integrated design handles almost every application Tank pressure gauge 10? CO2 line