This professional Air Stone is made of high-class materials, durable and practical, and has a . This is a great way to add oxygen to your aquarium, fish tank, hydroponics and circulatory system. use in fish tanks and aquariums. It will be your . Features -Color:Blue -Material:Sand, plastic - Size: 4.00X1.50X1.50cm/1.57X0.59X0.59in -It has capacity for repeatedly producing a lot of small and tiny bubbles. -It can repeatedly diffuse fine and uniform bubbles, with rapid aeration. You can send it as a present for your friends who raise fish, give them a little . -It has premium and relative , with performance. Good for maintaining the health of your pet , make their daily life more happy. -The material of choice is undoubtedly good material, safe, durable and practical. -The excellent workmanship of our products will bring you a good user experience. Package list: Bubble Stones