Condition: 100% Brand New_x000D_ Item Type: Air Stone_x000D_ Material: Plastic _x000D_ Color: As picture shown_x000D_ Size: Approx. 4.3 x 1.5cm/1.7 x 0.6in 1Adopt high temperature reunion, good air diffusibility, good filterability, strong ozone resistance and corrosion resistance. 2Can increase the oxygen content, reduce carbon dioxide and increase the pH, which will produce water flow. 3It is an important tool for keeping the fish's breathing process in the fish tank. 4Can be widely used in a variety of places, perfect accessories for aquarium. 5High quality plastic material, non-toxic, sturdy and durable to use.Please note that the colors of this product are sent randomly, please don't mind before ordering.10 x Air Stones