Fast and Efficient Tool: The upgraded siphon starts suction flow in only 5 seconds, faster than standard models. With the expansion hose (inner diameter: 8 mm, outer diameter: 10 mm), your work will be easier and time-saving. Easy to Use: This lightweight and portable siphon hand fuel pump features an arrow indicating the direction of liquid flow. Connect the PVC hose, insert the top tube into the tank, and press the bulb to initiate flow. Place the bottom tube in the desired container and liquid flows automatically when the source fluid is positioned at least 11 inches above the target. High Quality: The siphon bulb is made of high-quality rubber, thick and durable. Both ends are constructed with heavy-duty aluminum and secured with a solid metal spring. Built-in stop valve prevents backflow. Includes a flexible, durable, thickened (2mm) transparent PVC hose (3 meters) resistant to gasoline, high temperatures, and corrosion for long-term use. Hose Clamp Fixation: Metal snaps on the connection head securely attach the siphon pump to the hose. Use hose clamps to connect hoses to various containers, preventing leaks and enabling hands-free operation. Provides added safety during fuel transfer. Includes brass connector for hose extension. Multipurpose: This hand pump is suitable for transferring air, natural gas, coolant, fuel, gasoline, diesel, oil, water, and other common liquids. Can also be used as a water changer for aquariums. Ideal for use with various vehicles without anti-theft filters, as well as brush cutters, lawn mowers, snow blowers, hedge trimmers, and more. Perfect for emergency pumping, draining pool covers, toilets, fountains, and venting or conveying liquids.