Package Dimensions:2 x 2 x 2 cm; 100 Grams Size:16mm Quantity:1 batteries required:No Item Weight:100 g welcome to my store, Hope you have a pleasant shopping trip! Features:1.High-quality Material: CNC machining of aluminum alloy material, durable, not easy to corrode, and long service life.2.Easy to Use: Large refinement area, increased air outlet area, efficient diffusion, good atomization effect, saving CO2 consumption.3.Multifunctional: CO2 carbon dioxide refiner + transparent acrylic visual bubble meter two in . Universal rotatable adjustment, supports horizontal and vertical connections.4.The external CO2 grass tank refiner will not occupy the space in the fish tank and affect the landscape in the tank.Specifications:Material: aluminum alloyColor: silversize:12mm-total length 11cm, diameter 12mm16mm-total length 11cm, diameter 16mmFunction: CO2 refiner + bubble counterPackage List:1 X Aquarium CO2 Diffuser Bubble CounterNotes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.2. Please allow 1-2cm slight dimension difference due to different manual measurement. High-quality Material: CNC machining of aluminum alloy material, durable, not easy to corrode, and long service life. Easy to Use: Large refinement area, increased air outlet area, efficient diffusion, good atomization effect, saving CO2 consumption. Multifunctional: CO2 carbon dioxide refiner + transparent acrylic visual bubble meter two in . Universal rotatable adjustment, supports horizontal and vertical connections. The external CO2 grass tank refiner will not occupy the space in the fish tank and affect the landscape in the tank. 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 High-quality Material: CNC machining of aluminum alloy material, durable, not easy to corrode, and long service life. Easy to Use: Large refinement area, increased air outlet area, efficient diffusion, good atomization effect, saving CO2 consumption. Multifunctional: CO2 carbon dioxide refiner + transparent acrylic visual bubble meter two in . Universal rotatable adjustment, supports horizontal and vertical connections. The external CO2 grass tank refiner will not occupy the space in the fish tank and affect the landscape in the tank. 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.