1、Made of high-grade material, which is non-toxic, safe, energy-saving and eco-friendly 2、The surface is treated with nickel oxide and the non-slip knurling design 3、Provides precise and clear carbon dioxide bubbles 4、Easy and simple in cleaning, changing or water filling 5、Comes with a suction cup, which is very easy and convenient to fix it on your fish tank Description:  This carbon dioxide diffuser is made of high-grade material, which is non-toxic, safe, energy-saving and eco-friendly. 3 colors are optional, which is very easy and convenient to install. So, what are you waiting for? Don't miss such a good chance. Features: 1. Made of high-grade material, which is non-toxic, safe, energy-saving and eco-friendly. 2. The surface is treated with  nickel oxide and the non-slip knurling design. 3. Provides precise and clear carbon dioxide bubbles. 4. Easy and simple in cleaning, changing or water filling. 5. Comes with a suction cup, which is very easy and convenient to fix it on your fish tank. Specifications: Condition: 100% Brand new  Item Type: Carbon Dioxide Diffuser Material: Aluminium Alloy Color: Silver, Blue, Purple (Optional) Length: approx. 6cm / 2.4inch Refinement Cup Diameter: approx. 24mm / 0.9inch Package Weight: approx. 30g Package Include: 1 x carbon dioxide diffuser 1 x suction cup