uxcell Green Plastic Aquarium Bubbles Releases Air Stone Aquarium Airstone; Suitable for : Aquarium Material : Mineral, Plastic; Airstone Body Length : 15.4cm/6.1" Total Size(Approx.) : 17 x 2 x 1.2cm/6.7" x 0.8" x 0.5"(L*W*H); Hole Outer Diameter : 4mm/0.16" Color : Green, Blue; Net Weight : 48g Package : 1 x Airstone