DescriptionAn air stone, whose purpose is to gradually diffuse air into the tankand provide oxygen for fish to breathe, is a necessity to have aroundyour house if you are a lover of aquatic animals. Our air stones aremade of high-quality material.Features- Color: White. - Material: Plastic. - Size: About 6.50X6.50X3.50cm/2.55X2.55X1.38inch. - Adopted of premium material, practical and durable with long service life.- Increasing air flow circulation to oxygenate water that is beneficial to pet fishes.- It is used to increase oxygen in the fish tank, a nice accessory for your fish tank.- A great way to add oxygen to your fish tank, aquarium,hydroponic and circulation system.- The bubbles are uniform, small and dense, with good oxygenation effect.