Our aquarium air stones pieces are designed to enhance the oxygen levels in your fish tank, ensuring a healthy environment for your aquatic pets. These oxygen fish tank diffuser pads are made from high-temperature materials, providing uniform air distribution and silent operation. Features -Color:Multi -Material:Sandstone -Size:8.00X8.00X6.00cm/3.14X3.14X2.36in - Suitable for hose with diameter of 4mm/8mm inner diameter - Note: Soak this product in water for 15 minutes before use! -Uniform bubble distribution: the aquarium air stones pieces are designed to distribute bubbles evenly, ensuring optimal oxygen supply throughout the fish tank -Silent operation: utilizing advanced silent technology, these air bubbler minimize noise, creating a peaceful aquatic environment for your fish -Hightemperature sintering: the air stones are treated with hightemperature sintering, making them resistant to deformation and damage, ensuring durability -Efficient oxygenation: made from sandstone materials, these bubble stones effectively increase the oxygen content in the water, enhancing the quality of life for your fish - performance: designed for prolonged use, these aquarium air stones pieces are reliable and less prone to malfunction, providing consistent performance Package list: 5 x Airstone