uxcell Plastic Fish Tank Aquarium Air Oxygen Stone Bubble Wall Tube 18 Inch Long Product Name : Aquarium Bubbles Air Stone; suitable for : fish Tank, Aquarium; material : rubber, Plastic Air Stone Total length : 45.7cm/18";tube diameter : 1cm/0.4" Air Stone Size(Approx.) : 45.7 x 2.5 x 2.5cm / 18" x 1" x 1"(L*W*H);hole outer diameter : 5Mm/ 0.02" Hole inner Dia : 2Mm/0.08";color : Green Net weight : 34g;Package content : 1 Sets Aquarium bubble Air Stone