【Parameter】Fits for 3/16"(4 mm）OR 5/16"(8mm) inner diameter tube. Color: Grey. Size: 2"x 2" (H x W). Net Weight: 3.84oz/Pcs, 19.3oz/Package. Specifications: Jetting Volume: 5 L/min, Suitable for 20-40" fish tank
【Feature】Abundant Tiny Bubble: This crazy air stone will create much more abundant cascade of tiny bubbles than you can ever imagine!
【Notice for use】BEFORE USE: You have to soak it in water for about 6 hours before connecting to an Air pump more than 4 W to run it.
【Maintain】Clean regularly by a brush as they get clogged after weeks or months of usage. Safe, Washable & Durable material keeps fish healthy and safe.
