Uxcell 2-Piece Aquarium Mineral Bubble Air Stone Bar, Blue Aquarium Air Stone; Color : Blue Material : Mineral Stone; Stone Size : 9.8 x 1.7 x 1.7cm/3.9" x 0.7" x 0.7"(LxWxH) Outlet Size : 1.2 x 0.3cm/0.47" x 0.12"(HxD) Weight : 97g Package Contents : 2 x Aquarium Air Stone