Faster and Efficient Pumping: Unlike most gas pumps in the market, the hoses have been upgraded to Dia 15mm, large for faster and easier pumping. The black siphon buld with Build-in one way stop Valve, prevents the backflow of the fluid. | Portable, Easy to Use: This gas siphon hand pump weights 290g only. It has an arrow on the black siphon buld to show the direction of the liquid. Connecting the PVC Hoses, putting the upper hose into the fuel tank, a few squeezes of the buld will get the flow of liquid started, put the lower hose into the container, and the liquid will flow automatically. | Multi-Use: Siphon pump for gasoline, oil, diesel, water and other common liquids, ideal for emergency gas transfer, also suitable for fish tank water transfer. not for drink water and edible oil. | Premium Quality: With 2 flexible & sturdy PVC hoses, upgraded 15mm diameter nozzle. 4 pcs of metal clips fix two hoses tightly, prevent from slippage & leakage. Include one hose clip to secure the hose standing into the holder without any spilling of liquid. | Satisfied Service: If the gas siphon pump you received has any quality problems ( man-made damage not included), or parts are missing, please inform us immediately, our sales team will provide you satisfied solution in 24 hours.