new 8mm stepper reduction motor precision peristaltic pump, precision all metal micro-type mini peristaltic pump, all metal gear reduction pump head group, peristaltic pump supports changing the direction of water flow in both directions, copper roller peristaltic pump head, with high requirements for workmanship. The pump tube adopts 2.5mm silicone tube, and the motor is an 8mm two-phase four wire stepper motor with a phase resistance of 22 ohms. The peristaltic pump weighs 5.2 grams. The nominal voltage of the motor is 5V and the rated current is 150mA. The maximum flow rate tested using our stepper motor drive board is 0.5mL/minute. The stepper motor can achieve high-precision quantitative output, but specific research is needed. Low voltage affect the maximum speed of the motor, and the flow rate be smaller under low voltage power supply. Stepper drivers need to be purchased separately. Color:As Shown Material:Plastic+Metal Package Contents: 1 * pump set 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.