Aquarium CO2 Diffuser Carbon Dioxide 16mm Bubble Counter Description: Stainless steel CO2 diffuser, durable and elegant, will add a beautiful landscaping to your aquarium. The CO2 diffuser supplies rich carbon dioxide to the aquarium plants in the aquarium, ensures that the aquatic plants absorb nutrients, and creates a good aquarium environment. High efficiency of carbon dioxide diffusion. Easy to install and use. It helps to provide plants with the right amount of CO2, improves plant growth and health with a sufficient supply of CO2. Suitable for use as decoration or a good source of aeration for a tank or aquarium. Specification: Material: Stainless steel 12mm: about 65x50mm/2.56x1.97in; outside diameter 12mm/0.47in 16mm: Approx. 65 x 50mm/2.56 x 1.97 inches; outer diameter 16 mm/0.63 in 12mmbubble counter: about 110x52mm/4.33x2.05in; outside diameter 12mm/0.47in 12mmbubble counter: about 110x52mm/4.33x2.05in; outside diameter 16mm/0.63in The package includes: 1 set of CO2 diffuser