1This CO2 aquarium regulator can assist your aquatic plants in their growth cycle. 2Always inject the right amount at the right time to keep your plants growing the right way. 3With 2 big dual display allows for easy reading of your settings to ensure that they are always where you want them to be. 4The precision construction of this regulator will ensure that you can always fine tune the amount of CO2. 5Perfect CO2 aquarium regulator to create the best growing conditions for your aquarium plants. Features:This CO2 aquarium regulator can assist your waterplants in their growth cycle. Always inject the right amount at the right time to keep your plants growing the right way. With 2 dual display allows for easy reading of your settings to ensure that they are always where you want them to be. The precision construction of this regulator will ensure that you can always fine tune the amount of CO2. Perfect CO2 aquarium regulator to create the best growing conditions for your aquarium plants.Specification: Material: Stainless steel + Aluminum alloy Color: Silver Suitable interface: G5/8, W21.8(Optional) Size: 12.5*12*7.5cm / 4.9*4.7*2.9 inch(Approx. Package list:1 xCO2 aquarium regulator