Features: Brand new and high quality The material mainly selected from carbon powder and graphites. Replacement of carbon brushes have the characteristics of wear, resistant. Each carbon brush have artificially written without errors. Replace the carbon brush, check if your anchors is burning, this damage may not solve the engine problem. If there spark when you encountered a new carbon brush, spark disappear naturally after grindings. Carbon brushes can be used on various power tool and Motor, and the type of machines is very wide. You can get 40 carbon brushes in 10 Size, each size contains 4pieces (7x17x19mm, 5x11x18mm, 6.5x7.5x13mm, 6.5x13.5x18mm, 6x10x17mm, 6x9x14 9mm, 7x11x18mm, 6x8x14mm, 5x8x13mm, 5mm). With storage box, the existence of storage box can make your storage easy Specifications: Material:Carbon+Metal Package Includes: 4Pcs 4x7x17x19mm Carbon Brush 4Pcs 5x11x18mm Carbon Brush 4Pcs 6.5x7.5x13mm Carbon Brush 4Pcs 6.5x13.5x18mm Carbon Brush 4Pcs 6x10x17mm Carbon Brush 4Pcs 6x9x14mm Carbon Brush 4Pcs 7x11x18mm Carbon Brush 4Pcs 6x8x14mm Carbon Brush 4Pcs 5x8x13mm Carbon Brush 4Pcs 5x8x15mm Carbon Brush note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.