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: _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