Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.Scope of application: power tools, electric circular, carbon brushes for aluminum machines 4.Usage: Used for repairing power tools, electric pick motors, angle grinders, and electric drills. 5.Tip: Poor motor operation is usually caused by worn carbon brushes. New carbon brushes can be replaced to restore motor rotation. 6.Material: Made of graphite and metal, with high hardness and wear resistance. Note: If you replace the carbon brush with a new and find that the carbon brush is worn or half worn within a few minutes or hours, it means that your rotor is broken. Please replace the rotor in time. Specifications: Material: Graphite & Metal Color: Black Brand name: Unbranded Size: 1.1x0.7x1.6cm/0.43x0.28x0.63inch (LxWxH) Weight: 108 g Package include: 30 x Electric Motor Carbon Brush