The aquarium air stone piece is a must-have for any fish tank enthusiast. Its robust construction and efficient oxygen diffusion make it an excellent choice for maintaining water quality. The removable air bubbler allow for easy cleaning and replacement, ensuring your aquarium remains in top condition. This product is suitable for both beginners and experienced aquarists. Features -Color:Black -Material:Sandstone -Size:16.00X13.00X2.10cm/6.29X5.11X0.83in - Suitable for hose with diameter of 4mm/8mm inner diameter - Note: Soak this product in water for 15 minutes before use! -Even air distribution: the aquarium bubbler stone is designed to distribute air evenly, ensuring that your fish tank receives a consistent supply of oxygen. -Quiet operation: utilizing advanced quiet technology, this air stone operates with minimal noise, providing a calm and serene environment for your aquarium. - hightemperature sintering: the hightemperature sintering process makes the air stone highly and suitable for various aquarium conditions. -Stylish design: the sleek and modern design of the air stone enhances the aesthetic appeal of your aquarium, making it more visually pleasing. -Easy to install: the air stone is simple to install; just connect it to an air pump, and it’s ready to use, making it convenient for all aquarium owners. Package list: 4 x Airstone