Features: 100% brand new and high quality 1. Carbon dioxide diffuser, easy to install, excellent effect 2. Excellent dissolution rate of carbon dioxide, making your aquatic plants more lush and beautiful 3. Nano integrated atomization film design to prevent air leakage, uniform foaming, and prevent large bubbles 4. Polished design, comfortable and beautiful 5. Pagoda-shaped interface, easy to install, prevent leakage, 6. New nano design, effectively avoid air leakage New Nano CO2 Atomizer/Diffuser Material: 304 stainless steel and ceramic Color: silver Size: (The diameter of the nano integrated atomization disc is 30mm) Length: 250mm*30mm .300mm*30mm.350mm*30mm.400mm*30mm Type: CO2 atomizer/diffuser (big cup style) Material: 304stainless steel and ceramic Color: silver white Size: Length: 250mm*36mm / 300mm*36mm /350mm*36mm /400mm*36mm /