Material:Carbon brush kit is made of graphite and copper, with excellent performance. Include 2pcs electric motor carbon brushes, size fixed to 6x9x15mm(thickness x width x length). Note:After installing carbon motor brushes, if they wear out or become half-worn within a few minutes or hours, it suggests a potential issue with your rotor. In such cases, timely replacement of the rotor is recommended. Easy Replacement:Worn out carbon brushes are a common cause of motor issues. Carbon brush for motor are designed to restore your motors electric braking and power, providing a cost-effective solution for maintaining the performance of your equipment. Easy Installation: Their precise fit makes installation quick and easy, allowing you to keep your tools in prime working condition with minimal downtime. These carbon brushes for power tools are an essential accessory for maintaining your equipment's performance., Manufacturer: LuminaCreek