Colour:Color1 Single head Quantity:1 Welcome to my store, Hope you have a pleasant shopping trip!Features:GOOD MATERIAL: This product is made of high quality aluminum alloy joint and high transparent acrylic material, strong, durable and corrosion resistant, stable and reliable, long service life. EASY TO OBSERVE: This product can monitor the carbon dioxide content of the aquarium through the acrylic high air permeability window, you can clearly see the amount of carbon dioxide outflow to supply sufficient carbon dioxide for aquatic plants to protect the healthy growth of fish, various aquatic plants and keep the aquatic circulation system stable. EASY INSTALLATION: This product is easy to install and disassemble, it can be installed between the aquatic plant meter and the CO2 dissolver, pay attention to the gas flow direction when installing, the operation is very convenient, easy to disassemble and clean.Specification:Material: Aluminum Alloy, AcrylicSingle Head Quick Plug Size: 8.4cmx2.0cm/3.3 "x0.8"Single-head quick screw model size: 7.4cmx2.0cm/2.9 "x0.8"Double-headed bubble model size: 7.5cmx2.0cm/2.9 "x0.8"Double-headed bubble model: both ends connect 4mmx6mm(IDxOD)/3/16" ID air hoseSingle quick release model: outer end connects to 4mmx6mm(IDxOD)/3/16" ID air hose, and end connects to M10x1 male thread or fine adjustment valveSingle-ended quick release model: 4mmx6mm(IDxOD)/3/16" ID air hose at both endsPacking List:1 x CO2 Bubble CounterNote:1.Please allow 1-2cm measuring deviation due to manual measurement.2.Due to the different monitor and light effect, the actual color of the item might be slight different from the color shown on the pictures. Please Understand, Thanks! GOOD MATERIAL: This product is made of high quality aluminum alloy joint and high transparent acrylic material, strong, durable and corrosion resistant, stable and reliable, long service life. EASY TO OBSERVE: This product can monitor the carbon dioxide content of the aquarium through the acrylic high air permeability window, you can clearly see the amount of carbon dioxide outflow to supply sufficient carbon dioxide for aquatic plants to protect the healthy growth of fish, various aquatic plants and keep the aquatic circulation system stable. EASY INSTALLATION: This product is easy to install and disassemble, it can be installed between the aquatic plant meter and the CO2 dissolver, pay attention to the gas flow direction when installing, the operation is very convenient, easy to disassemble and clean. APPLICATION: This product is compatible with most Co2 systems and is connected to the CO2 diffusion tube with a non-reverse function to prevent water from flowing back to the protective gas cylinder due to pressure changes. 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 GOOD MATERIAL: This product is made of high quality aluminum alloy joint and high transparent acrylic material, strong, durable and corrosion resistant, stable and reliable, long service life. EASY TO OBSERVE: This product can monitor the carbon dioxide content of the aquarium through the acrylic high air permeability window, you can clearly see the amount of carbon dioxide outflow to supply sufficient carbon dioxide for aquatic plants to protect the healthy growth of fish, various aquatic plants and keep the aquatic circulation system stable. EASY INSTALLATION: This product is easy to install and disassemble, it can be installed between the aquatic plant meter and the CO2 dissolver, pay attention to the gas flow direction when installing, the operation is very convenient, easy to disassemble and clean. APPLICATION: This product is compatible with most Co2 systems and is connected to the CO2 diffusion tube with a non-reverse function to prevent water from flowing back to the protective gas cylinder due to pressure changes. 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.