Portable Electric Small Drill Pump Self-Priming Hand Drill Powered Water Pump Commodity parameters: Weight: 400g (0.88 lb) Size: 12.5cm * 10.77cm (4.92 * 4.24 inches) Upper and lower diameter: 7.86cm (3.09in) Left and right outer diameter: 2.1cm (0.83 in) Inner diameter: 1.58cm (0.62 in) Please refer to the dimension drawing for the specific size Purpose: pump water in any environment (Note: do not use strong acid or alkali, gasoline or high temperature) Material: engineering plastics Driving mode: Electric Principle: centrifugal pump Packing list: Pump + sealing ring + filter.