If you are looking for professional and reasonably priced blistering stone blisters, then your research is here. That's because our products can meet your needs. Using materials, durable. It is not easy to deform and brings you of convenience. Features -Color:Grey -Material: Dinas -Size: About 4.00X4.00X1.50cm/ 1.57X1.57X0.59inch -Size: About 6.00X6.00X1.50cm/ 2.36X2.36X0.59inch -The material is sturdy and durable and can be used for a long time. -Suitable for freshwater, seawater aquariums, hydroponics or fish tanks. -Diffusion of small and large bubbles in water, the effect of aeration is better. -It is undoubtedly suitable for ornamental fish and large fish farming. -Connect the air pump and put it in the water to help the air pump absorb oxygen into the water. You need to connect the air pump to have Package list: 10 X Bubble stones