uxcell Seashell Shaped Mineral Bubbles Aquarium Air Stone, Blue Aquarium Bubbles Air Stone; Suitable for : Fish Tank, Aquarium Design : Conch Shell Shaped; Material : Mineral, Plastic Fit Air Tube : 4mm/0.16";Air Stone Size(excluded connector) : 70 x 55mm/2.8" x 2.2"(W*L) Total Length : 69mm/2.7";Color : Blue Weight : 19g;Packag : 1 x Aquarium Bubbles Air Stone