Fits all drill chucks. The electric drill pump self-priming conveying pump has large flow, stable performance and high efficiency. Fine workmanship and good performance. small volume. Lightweight. Easy to install. Operating Instructions: For best start-up and service life, put a few drops of lubricating oil on the pump inlet before each use, and rinse with clean water after each use. Make sure the inlet hose is tight and as short as possible. The water inlet hose should not exceed 3 meters. When pumping abrasive fluids or liquids containing solids, longer pump life can be obtained by using a filter on the inlet line. Surface mounting of the pump is recommended for safety and ease of use. Mount and start. Observe the inlet tube to confirm that fluid is drawn into the pump within 15-20 seconds. If not, check that the inlet tube is properly installed on the inlet pump. If the pump won't start, do not run dry, check to make sure the hose is not clogged. The pump relies on the water being pumped for lubrication.Please note that due to the possible color and size difference between the light effect photo and the real object, please allow 1-2 cm errorQuantity: (1) Suction PumpColor: blackSize: tube inner diameter 15mm, drive shaft 8mm