Well Done The siphon pump is equipped with a non-return valve. The rubber ball has a one-way inlet valve to prevent fluid backflow. The rubber ball and the oil inlet valve are reinforced with a reinforcement ring and a stainless steel hose clamp to clamp the pipe and prevent the flow of fluid. User-friendly and ConvenientThe manual water pump is easy to drain the liquid. Simply depress the rubber fuel hand pump until the tube is full of fluid. High quality PVC pipe is good wear and resistance property. You can see the liquid flow process. PortableThe hand water pump is small in size and easy to store. Put it in your car so you don't have to worry about running out of gas when you go out. Wide ApplicationThe fuel pump is suitable for car, fuel tank, car aquarium, motorbike fuel tanks, deep fryer etc. Caution Make sure the tube is filled with liquid and the end of the siphon must be held under the container you are trying to empty . Number of pieces delivered: 1 Size: the inlet pipe is about 1.2 meters, the outlet pipe is about 0.8 meters, and the diameter is 15mm lucky meet</p >Note: The data is all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.