16" Air Stone - TOOGOO(R) Aquarium Fish Tank Bubble Air Stone Bar Oxygen Pump Green+Blue 16" Product Name : Aquarium Air Stone Suitable for : Aquarium Material : Mineral, Plastic Air Stone Body Length : 41cm/ 16"; Hole Outer Diameter : 5mm/ 0.2" Total Size(Approx.) : 42 x 2 x 1.4cm / 17" x 0.8" x 0.6"(L*W*H)