Uxcell Plastic Aquarium Oxygen Circulate Pipe, 3m, Clear Aquarium Oxygen Pipe; Main Color : Clear; Material : Plastic, Mineral Pipe Length : 3 Meters/9.8Ft;Pipe Internal Diameter : 4mm/0.15" Pipe External Diameter : 5mm/0.2";Air Stone Size : 30 x 41mm/1.2"x1.6"(DxL) Valve Size : 40 x 22mm/1.6"x0.87"(LxW);Valve Inner Diameter : 3mm/0.12" Weight : 72g;Package Contents : 1 x Aquarium Oxygen Pipe,1 x Air Stone,1x Control Valve