?Premium Quality Rubber? Rubber hand pump, with 2 flexible & duarable PVC transparent hose, upgrade18MM diameter and 2MM thickness nozzle, large diameter & large flow rate, faster and easier for oil pumping. Come with two fixed hose clips to secure it in place. ?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.Also can be a water changer for fish tank at you home. ?Easy To Use fuel pump? Built-in outlet and inlet valve to prevent backflow, extraction directly, liquid outflow in 5 seconds. The arrow indicates flow direction. ?Hand Siphon Pump? High-Flow Hoses And Large-Bore Ball Pumps Are Faster At Pumping, And The Built-In Pump Allows You To Siphon Liquid From One Container To Another. ?Warm Tip? The liquid you are trying to extract must be higher than the influential barrel. The joint end must be preserved inside the liquid, not just on the surface. Manual siphon pump water. ?Note? The fluid you are trying to extract has to be HIGHER than the influent bucket. The fitting end must kept inside of the fluid not just on the surface.