Product Name: Motor Carbon Brush;Suitable: Electric Grinder, Drill Carbon Brush Size: 14 x eight x 5mm/ 9/16" x 5/16" x 3/16" (L*W*T);Total Length(): 3/ 1" (When Spring Stretching) Material: Carbon & Metal;Color: Black & Net Weight: 12g The coils of the motor ought to be connected to finish an electric circuit for correct use. Carbon brush is a merchandise clean to broken when it operating . eight pcs substitute carbon brush clear replace the spoiled one . This is a non-product. Package Contents: 8 x Motor Carbon Brush Only the above package content, different merchandise usually are not included. Note: Light and assorted exhibits may cause the color of the article in the picture just a little varied from the real thing. The size allowed error is +/- 1-3cm.