Description: 【Material】: The main body of the Diffuser is made from aluminum alloy, while the observation chamber is made of PC, ensuring longevity and reliability. 【Great Diffusion】: The Aquarium CO2 Atomizer provides delicate diffusion, producing almost imperceptible tiny bubbles. This greatly enhances the dissolution rate, ensuring optimal use of Co2 your aquarium. 【Check Valve Design】: The air tube connector has a built in check valve to prevent backflow when the traditional external refiner stop gas flow. 【Transparent】: CO2 Diffuser with Clear viewing chamber can be used to observe the refinement effect. 【Easy to use】The top is connected to the water outlet hose in the cylinder, the right side is connected to the Co2 pipe, and the bottom is connected to the water outlet hose of the filter barrel. Size Chart: 12.3cmx5.1cm/4.84inchx2.01inch Package Includes: 1 Aquarium CO2 Atomizer  Note: Please allow slightly errors 1-2cm differences due to manual measurement.