Bo Sheng Jiangsu Haimen Carbon Co., Ltd., specialized in producing micro-motor with carbon brush, hoping to have the opportunity to cooperate with your company. We are recently established company, but our equipment is very advanced, and has its own formula, the anti-wear, noise, spark control, etc. are good. If you are interested, you can model your company with a brush drawings sent me, out of our system send you a free trial sample, it is important that we can provide you with better prices than their peers. 
 I wish Regards!