Features: Large flows, stable performance 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 for 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 it39;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: suitable for 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 different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: Approximately 12.5*6.3cm Inner diameter of water inlet/outlet: 16mm Outer diameter of water inlet/outlet: 19mm applicable to 6 pipes Package List: 1 x Self-Priming Transfer Pump