PORTABLE AND EASY TO USE: This gas siphon hand pump weighs only 290 grams. It has an arrow on the black siphon hose to show the direction of the liquid. Connect the PVC hose, put the upper hose into the tank and squeeze it a few times to start the liquid flow, put the lower hose into the container and the liquid will flow automatically. MULTIPURPOSE: The siphon pump is suitable for gasoline, oil, fuel, water and other common liquids, great for emergency gas transfer, also suitable for fish tank water transfer. Not suitable for drinking water and cooking oil.