uxcell Aquarium Oxygen Balance Circulate Hose Pipe Black 2.5M Length + Air Stone Product Name : Aquarium oxygen Pipe +Air stones;color : White, Black Material : soft Plastic;Pipe Total length : 2.5M / 8.2Ft Air stones size : 30 x 12Mm/ 1.2" x 0.5"(L*d);water Valves internal diameter : 3.6Mm/ 0.14" Weight : 49g Package Contents : 1 x Aquarium oxygen Pipe;4 x Air stones