Loopunk Air Stone for Aquarium, 8pcs Aquarium Airstone Bubble Oxygen Fish Tank Diffuser Round 4cm

【Airstone Material】: emery, etc. They are cooked at a high temperature of 1500 degrees Celsius. High quality materials, durable and durable, safe to use. 【Large oxygen supply】: high temperature firing, high density and fine pores, large volume of dissolved air, anti-lock and durable. 【Interface】: PVC interface, durable, not easy to adhere to bacteria, not easy to damage. Beautiful bubbles add beautiful scenery to the aquarium and fish tank. 【Airstone Usage】: Connect to the air pump and put it in the water to help the air pump pump pump oxygen into the water. Can be washed repeatedly. 【Airstone Size】: diameter 4 cm, PVC interface diameter 0.5 cm.