SODIAL(R) Aquarium Fish Oxygen Cylinder Air Stone 3cm Length 5 Pcs Product Name : Aquarium Air Stone;Suitable for : Aquarium Design : Cylinder;Material : Mineral, Plastic Dimentions(port not included) : 2 x 3cm / 0.8" x 1.2"(D*H);Air Tube Port Outer Dia : 5mm / 0.2" Main Color : Gray;Net Weight : 75g Package : 5 x Air Stone