Feature -Made of hard aluminum alloy, surface spraying porcessed, very nice Appearance -12V DC quiet low temperature solenoid valve. Power on, CO2 come out, Power off, CO2 cut off. Easy for you to progrom your CO2 together timer. -Bubble counter with check valve function, easy for your to read the CO2 flowrate.

Together with check valve function, stop water back to the CO2 bottle -High precision tuning, easy to realize 1 bubble per 3 seconds -Promotion of plants growth activates photosynthesis to stabilize ecosystem. -Big dual gauge for both bottle inner and outlet working pressure displaying. -Together with Solenoid valve, using timer it can turn on/off automatically as you programmed.

Package Included 1 x Double mini Display Valve body 1 x 110v US standard solenoid valve installed on the valve body 1 x Fine-tuning Valve installed on the valve body 1 x Bubble counter with check valve fucntion 1 x installing tools

Attention: Only suite for CGA320 interface cylinder. -If you have fishes in your plant tank, DON'T add large doses suddenly, large dose CO2 will affect the PH of the water much, the fishes may be will not fit in.