Precision processing, plastic, , and long service life. Large flow rate, stable performance, high efficiency, and easy installation. The pumping speed is fast, with a capacity of 20-30 liters per minute (depending on the drill bit speed). Install all mandrels and use an electric drill to obtain the pump, making it easy to use. Compact and design, portable, easy to store.<br><br>The recommended speed is 1500-3500 rpm. The and flow rate of the pump are related to the rotational speed. The faster the speed, the greater the water and flow rate. 1500 rpm, pump approximately 1.5 meters, flow rate approximately 15 liters per minute. 3000 rpm, pump approximately 3 meters, and flow rate approximately 30 liters per minute. Color: Black Material: Plastic Inner tube diameter: approximately. 15mm<br><br>Package Contents: 1X small water pump With accessories<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.