This is for a carbon brush assembly that is used in generators for charging.suitable for 4KW 5KW 7KW generator. This product contains 10pcs, sufficient for you to replace the broken one of your generator. Features: A carbon brush is used for transferring energy or signals between the fixed part of the generator and the rotating part. This is for a carbon brush assembly that is used in generators for charging. This product contains 10pcs, sufficient for you to replace the broken one of your generator. This carbon brush set is suitable for 4KW 5KW 7KW generator With good conduction, heat conduction and lubricating properties, and have certain mechanical strength, good reversing performance, long serving life Specifications: Model: GX390Suitable for: 4KW 5KW 7KW generator Size: as the picture Weight: 146g Quantity:10 PCS Package Included: 10 x carbon brush