[Built-in on/off valve] the valve on the faucet pump can control the water flow direction [High-quality metal copper] built to last [Quick Water Change] Only two valves and a long hose are needed to quickly complete the water change of the fish tank, and use the pressure of tap water to drain water. This semi-automatic water changer is suitable for medium and large fish tanks. [No Buckets, No Spill, No Noise] Easy to install and simple operation, no bucket required, the dirty water in the fish tank is drawn out under the pressure of tap water, After the drain is completed, just switch the valve to add water. Note: The colors of gaskets and aprons are black or white randomly, and the designation is not accepted. Colour:Black Material:plastic Package Contents: 1 * fish tank cleaner 1 * tube(300 cm long, inner diameter: 12mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.