Description: This carbon dioxide diffuser is made of high quality material, which is non-toxic, safe, energy efficient and eco-friendly. 3 colors are optional, which is very easy and convenient to assemble. So what are you waiting for? Don't miss out on this great opportunity. Characteristics: 1. Made of high quality material, which is non-toxic, safe, energy efficient and environmentally friendly. 2. The surface is coated with nickel oxide and non-slip knurled design. 3. Provides precise and clear carbon dioxide bubbles. 4. Easy and simple to clean, replace or fill with water. 5. Comes with a suction cup that is very easy and convenient to attach to your aquarium. Technical data: Item Type: Carbon Dioxide Diffuser Material: Aluminum Alloy Color: Silver Length: approx. 6 cm/2.4 inch Sophisticated cup diameter: approx. 24mm / 0.9 inch Package weight: approx. 30g The package includes: 1 x Carbon Dioxide Diffuser 1 x Suction Cup