uxcell Aquarium Tanks 19.5" Length Green Blue Mineral Bubble Stone Oxygen Diffuser Product Name : Aquarium Air Stone;suitable for : Tank, Aquarium Shaped : bar design;material : Mineral, Plastic Outlet Connector diameter : 2.5Mm/ 0.1";Stone length : 49.5cm/19.5" Total size (Approx) : 53x 2.1 x 1.2cm/ 20.8" x 0.8" x 0.5" ( L*W*T);color : Green & Blue Weight : 150g;Package : 1 x Aquarium Air Stone