Jardin Mineral Bubbles 10-Piece Air Stone Air Stones for Aquarium, Cylinder Shaped, Blue Product Name : Aquarium Bubbles Air Stone; Suitable for : Fish Tank, Aquarium Material : Mineral, Plastic; Import Diameter : 4.8mm/0.19" Size(Approx.) : 3.9 x 1.3cm/1.5" x 0.49"(L x W); Color : Blue Weight : 44g Package : 10 x Aquarium Bubbles Air Stone