Description This airstone is sintered at high temperature. With a smooth surface and evenly distributed air outlets, it helps transport oxygen to fish and other aquatic life in fish tanks, ponds, aquariums, and similar environments. It can also be used for water purification, filtration, ozone sterilization, and aeration. Features - Color: Blue - Material: Sand - Size: Approx. 3.8 x 1.5 x 1.5 cm / 1.5 x 0.59 x 0.59 inch - Connects to an air pump and disperses air into the water, assisting in oxygenation - Provides uniform bubble dispersion for efficient oxygen dissolution - Stable and durable for use in freshwater and saltwater environments - Easy to clean and reusable - Produces attractive air bubbles that enhance the visual appeal of aquariums and fish tanks Packing List 12 x Airstone Note: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement.