Features:Large flows, stable percompatiblemance and high efficiency. The flowing rate of the water pump varies according to the power and speed of the electric drill used.EASY TO USE: The self-priming transfer pump is a compact, self-priming, battery-free borehole pump compatible professional use. Just attach an electric drill and the steady and fast flowing of 20-30 liters per minute is amazing.NO BATTERIES AND ELECTRICITY: The self-priming transfer pump requires no batteries. You simply attach your electric drill to this pump and it&39;s to pump water, oil and more The hex shank of the drill pump is compatible with different kinds of drill blocks.Wide range of uses: compatibleable compatible transporting light liquids such as freshing water, sea water, oil, pesticides, and liquid fertilizers.Easy to carry: Compact design, easy to carry and store.Notice:1.Actual color may be slightly different from the image due to differentlight effect2.Please allow 1-3cm deviation due to manual measurementDescription:Size: Approximately 12.5*6.3cmInner diameter of water inlet/outlet: 16mmOuter diameter of water inlet/outlet: 19mm (applicable to 6 pipes)