Colour:Color 1 Quantity:1 welcome to my store , Hope you have a pleasant shopping trip! Features:1.Universal adjustment direction fine-tuning valve, suitable for side-opening gas cylinders and top-opening gas cylinders;2.With non-reverse bubble meter; precise fine-tuning valve to adjust the air output, high sensitivity;3.Ideal for growing aquariums or any other application that requires precise control of CO2SpecificationsUse voltage: input voltage AC 100V-240V output voltage DC 12VMaterial: 304 stainless steel, aluminum alloyPower plug: UK plugWorking pressure: 25 BarWorking temperature: -20~180Outlet pressure adjustment range: 1-5 BarThreaded interface: W21.8/CGA320Output pressure regulation: 0-5KGPackage List:1X Dual Gauge Aquarium CO2 Regulator kitTips1.Turn CO2 OFF 1 hour before the lights go out. there should be enough CO2 remaining in the tank for the last hour of the photoperiod.2.Experiment with the CO2 levels before introducing fish into the tank. This will avoid putting the fish at risk.3.Be careful not to inject too much CO2 to high levels as this could harm your fish. Double Pressure Gauge Display, the Pressure Is Clearly Displayed, Indicating the Cylinder Pressure and the Output Working Pressure With the Attached Bubble Counter, You Can Count the Bubbles Entering the Aquarium and Adjust the Needle Valve to Achieve the Desired Bubble Rate High Precision Needle Valve Allows You to Precisely Control the Amount of Carbon Dioxide Entering the Aquarium Working Voltage DC 12V, Safe and Stable, Low Power Consumption, Low Heat Generation, Easy Installation and Use SHOP WITH CONFIDENCE: To Provide You With the Highest Quality Service, If You Have Any Question, Please Feel Free to Contact Us.We Will Provide After-sales Service Until You Are Satisfied. See more product details Double Pressure Gauge Display, the Pressure Is Clearly Displayed, Indicating the Cylinder Pressure and the Output Working Pressure With the Attached Bubble Counter, You Can Count the Bubbles Entering the Aquarium and Adjust the Needle Valve to Achieve the Desired Bubble Rate High Precision Needle Valve Allows You to Precisely Control the Amount of Carbon Dioxide Entering the Aquarium Working Voltage DC 12V, Safe and Stable, Low Power Consumption, Low Heat Generation, Easy Installation and Use SHOP WITH CONFIDENCE: To Provide You With the Highest Quality Service, If You Have Any Question, Please Feel Free to Contact Us.We Will Provide After-sales Service Until You Are Satisfied.