uxcell Silicone Aquarium Air Oxygen Circulate Flexible Pipe, 2.5Meter Product Name : Aquarium Oxygen Pipe; Color : Clear Material : Soft Silicone; Total Length : 2.5m/8.2Ft Internal Diameter : 6mm/0.24";External Diameter : 8mm/0.31" Weight : 33g Package Contents : 1 &times; Aquarium Oxygen Pipe