-saving: Co2 diffusers are made with high-grade materials that are -saving. They do not require much power to function, which means you can save money on your electricity bill. High Performance: Co2 diffusers have excellent dissolved rates and produce excellent effects for aquariums. This means you can get the most out of your plants and fish. Easy to Install: The stainless steel tube of high quality material makes the kit easy to install and not as fragile as glass. You don't have to worry about breaking it during installation. and Clear: The Co2 diffuser provides and clear carbon dioxide , making it easier to monitor and adjust the CO2 levels in your aquarium Practical: With a simple design and the best safety performance, Co2 diffusers are practical and easy to use. You don't have to be an expert to install and use one properly. Color:Silver Material:Stainless Steel Package Contents: 1 * carbon dioxide diffuser Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.