Description This professional air bubble stone, made of premium material, is durable and practical with long service life. It is a great add oxygen to your aquarium, fish tank, hydroponic and circulation system. Great for fish tank and aquarium use. It will be the good choice for you. Features - Color: As Shown. - Material: Nano. - Size: 10.00X10.00X4.50cm/3.93X3.93X1.77inch. - Durable, great for home, office fish tank, aquarium and hydroponics nutrient tanks. - The surface is frosted, delicate and smooth, and the bubble output is more even. - Maximizes the outlet area of the air stone to provide a larger area for bubbles. - Add beauty to your display aquarium with this air bubble stone to create micro bubbles. - Produce fine air bubble that increase oxygen levels and circulate nutrition. Durable, great for home, office fish tank, aquarium and hydroponics nutrient tanks. The surface is frosted, delicate and smooth, and the bubble output is more even. Maximizes the outlet area of the air stone to provide a larger area for bubbles. Add beauty to your display aquarium with this air bubble stone to create micro bubbles. Produce fine air bubble that increase oxygen levels and circulate nutrition.