Features:_x000D__x000D_Made of high-grade material, which is non-toxic, safe, energy-saving and eco-friendly. _x000D_Provides precise and clear carbon dioxide bubbles. _x000D_Simple design, the best safety performance. _x000D_Easy and convenient to use and install. _x000D_Also come out with excellent dissolved rate and produces excellent effect for the aquarium. _x000D__x000D_Specifications:_x000D_Condition: 100% Brand New _x000D__x000D_Diffuser Material: Stainless Steel _x000D_Atomizing Nozzle: Approx. 2cm / 0.8", 3.05cm / 1.2" (optional) _x000D_CO2 Diffuser Length: Approx. 20cm / 7.9", 25cm / 9.8", 35cm / 13.8", 40cm / 15.7" (optional)_x000D_Package Weight: Approx. 6g~205g_x000D__x000D_Package Include:_x000D_1 x CO2 Diffuser Or 1 x Atomizing Nozzle_x000D__x000D__x000D__x000D_Note:_x000D_It is normal that large bubbles will appear on the thinner sheet at the beginning of use. After 24 hours of continuous use, the large bubbles will gradually decrease, and the large bubbles will disappear within 3 days at most. 1Made of high-grade material, which is non-toxic, safe, energy-saving and eco-friendly 2Provides precise and clear carbon dioxide bubbles 3Simple design, the best safety performance 4Easy and convenient to use and install 5Also come out with excellent dissolved rate and produces excellent effect for the aquarium