What is this?This is a motor accessory that is mainly used to change the direction of the rotor current to keep the motor rotating in the same direction. Widely used in power tools, home appliances, high-speed DC motors, and other fields.What will I get?Copper Bar Number: 5Total Size: 5 × 10 × 22mm / 0.20 × 0.39 × 0.87'' (OD*ID*H)Copper sheet height: 14mm / 0.55''In the package of: 1 × Electric Motor CommutatorAre there any advantages of the product?Made of copper material, it has good wear resistance and can run at high speed.What should I notice?The gears mounted on the motor cannot be removed.