Description This air bubble stone is made of fine material for durable and long-lasting use. Designed to add oxygen and circulate nutrition to your hydroponic growing system or aquarium. Suitable for hydroponic systems, ponds, aquariums, fish tanks and other systems. Features - Color: Assorted Color.- Material: Nano.- 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 round air stone to create micro bubbles.- Produce fine air bubble that increase oxygen levels and circulate nutrition. Packing list: 1 x nano bubble stone