XIANQI 【Essential Aquarium Accessories】: Aquarium air stone bar can be connected with air pump to generate lots of bubbles, which can increase the oxygen capacity in aquarium to provide your fishes a healthy environment. 【Premium Material】: Fish tank bubble bar is made of high-quality air stone, sturdy and durable, which can provide even bubbles and not easily be clogged. The green shell is made of safe plastic, non-toxic and environmentally friendly, no pollute to water. 【Appropriate Size】: The length of air stone bubble bar is 10cm/4inch, suitable for air pump with power of 3W. Large contact area provide plenty of oxygen for your fishes and even bubbles can add to the beauty of aquarium. 【Wide Application】: Air stone bubble diffuser can be used in aquarium, fish tank, ponds, hydroponics, seafood market, freshwater or saltwater aquarium, etc. 【What You Get】: Comes with 15 pieces air stone for aquarium. Washable and reusable, large quantities are enough for your different demands. Feature: Aquarium bubble bar can generate lots of bubbles to increase the the oxygen capacity, reduce carbon dioxide and increase pH valve in aquarium, which can provide your fishes a healthy and safe environment. The length of aquarium oxygen stone is 10cm/4inch, suitable for aquarium size lager than 20x200cm. Friendly Reminder: 1.Please soak the aquarium air stone bar completely in water for 1 hours before first use; 2.In long-term use, if the air stone bar is clogged with dirt and bubbles is reduced, you can cleaned it and reusable; 3.10cm aquarium air stone can be used with air pump of 3w. The larger the wattage of air pump, the better the air output effect. Specification: Material: plastic+air stone Size: Length: 10cm/4inch Connection Dimension: 4mm Color: blue+green Single Weight: 27.5g Package Includes: 15*aquarium air stone bar