100% pure copper wire winding, high speed and high torque. Equipped with fan blades to reduce temperature, fast heat dissipation, and long service life. Imported double ball bearings with low resistance. Suitable for various electric tools, electric screwdrivers, Juicer, Paper shredder, bubble machines, household small motors, DIY mini drill floors, and other industrial equipment supporting motors. Motor size: 120 54mm. Output shaft size: 6 20mm. According to your choice. There are NO EXCEPTIONS! OR, you may choose to have a replacement. We will reply you ASAP. Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem you have.