DescriptionThe air stone is designed to gradually diffuse the air into the water tank and provide oxygen for the fish to breathe. If you are a fan of aquatic animals, the surroundings of your house are essential. Our air stones are made of high-quality materials and are durable.Features-Color: As Shown-Material: Dinas -Size: About 4.00X4.00X1.50cm/ 1.57X1.57X0.59inch -Size: About 6.00X6.00X1.50cm/ 2.36X2.36X0.59inch-Increase air circulation and oxygenate the water, which is beneficial to pet fish. -It is used to increase the oxygen in the fish tank. It is a good accessory for your fish tank. -A great way to add oxygen to your fish tank, aquarium, hydroponics and circulatory system. -The bubbles are uniform, small and dense, and the oxygenation effect is good. -Using high-quality materials, practical and durable, and long service life.