Durable:The hose is Made of 2mm thickness PVC, tube length can be freely cut as needed,flexible corrosion resistant and clear, you can easily see the liquid flow. Function:With oil suction pump, you can make a small oil change, transfer petrol into a canister or refill the tank. Double Check Valve Design:Oil resistant rubber sphere, anti slip and anti aging.Wide used for petrol diesel petrol oil water and other common liquids, also can be a water changer for aquarium Easy to use:Just insert the oil inlet pipe into the bottom of the fuel tank, and insert the oil discharge pipe into the prepared fuel tank, press the rubber ball 5-10 times and the liquid automatically flows out. Faster Flow Rate:Good operation,5s quick oil output, easy to use and carry.A variety of models are applicable, trucks, cars, motorcycles and other models can be used. Specification: Material: PVC+ Rubber+ Metal Pipe Thickness:2mm/0.08inch Pipe Outer Diameter: 18mm/0.71inch For Transfer of Liquids as Gasoline, Diesel, Oil, Water etc. Hose length: 1m/1.5m/2m/3m (Optional) Package Includes: 1 Piece Suction ball 1 Piece Hose 2 Pieces Valve Clips Note: According to the arrow, identify the inlet and outlet pipes. Disconnect the oil pipe. Insert the oil inlet hose into the fuel tank and touch the bottom of the fuel tank. Insert the oil line into the prepared oil barrel. Squeeze the rubber ball 510times. Then the liquid automatically flows off. Note: This hand pump is suitable for the fuel tank that does not contain a theft proof oil filter. The height of the oil inlet is higher than the height of the oil outlet. Clean it soon after use to avoid clogging the oil pipe.