Product Description:The motor stator winding is copper wire and controlled by CW/CCW. This allows the car to run very smoothly with little noise. High speed and high torque. It needs an external constant current controller to realize the function of speed regulation. Good workmanship and excellent performance. Stable and reliable. Durable. It is an ideal choice for DIY generator. It can be used in marshmallow machine, small cutting table, mincer, medical equipment and others for mechanical equipment. Product Specification: All New Size: About 71*51mm Aperture: About 3mm Thread Length: About 13mm Power: 12-24V Voltage & Speed: DC 12V 3500rpm / DC 24V 7000rpm Voltage (VDC) Package Included: 1 Permanent Magnet Motor Note: Due to manual measurement, please allow 1-5mm error. The color of the items shown in the pictures may be slightly different on the computer monitor since the calibration of the monitor is different. Dear buyers, welcome to our store. You can refer to the website for more details about the goods. Welcome to visit. I hope you have a nice day!