Package Dimensions:12.7 x 7.9 x 4.2 cm; 80 Grams Size:12mm Quantity:1 batteries required:No Item Weight:80 g welcome to my store, Hope you have a pleasant shopping trip! Features:1.High-quality Material: The surface is anodized with high-strength aluminum alloy material, which is corrosion-resistant, durable and has a long service life.2.The Strong Water Flow Design of the Thinning Sheet: No resistance, no influence on the water flow, large thinning area, increase the dissolution rate, and save the amount of CO2.3.Easy to Observe: With a small visual window, the observation window and the strong water flow design are combined into , and the refinement effect can be observed through the small window.Specifications:Material: Aluminum AlloyApplicable: 12mmPackage List:1 X Aquarium CO2 Diffuser External Reactor2PCS X Fixed ClampNotes: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: The Surface Is Anodized With High-strength Aluminum Alloy Material, Which Is Corrosion-resistant, Durable and Has A Long Service Life. The Strong Water Flow Design of the Thinning Sheet: No Resistance, No Influence on the Water Flow, Large Thinning Area, Increase the Dissolution Rate, and Save the Amount of CO2. Easy to Observe: With A Small Visual Window, the Observation Window and the Strong Water Flow Design Are Combined Into , and the Refinement Effect Can Be Observed Through the Small Window. Easy Installation: Just Connect to the Hose Between the Filter and the Aquarium, Suitable For Filter Hoses With An Inner Diameter of 12mm. 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: The Surface Is Anodized With High-strength Aluminum Alloy Material, Which Is Corrosion-resistant, Durable and Has A Long Service Life. The Strong Water Flow Design of the Thinning Sheet: No Resistance, No Influence on the Water Flow, Large Thinning Area, Increase the Dissolution Rate, and Save the Amount of CO2. Easy to Observe: With A Small Visual Window, the Observation Window and the Strong Water Flow Design Are Combined Into , and the Refinement Effect Can Be Observed Through the Small Window. Easy Installation: Just Connect to the Hose Between the Filter and the Aquarium, Suitable For Filter Hoses With An Inner Diameter of 12mm. 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.