... 3.resined materials 4.high density carbon bearings 1.We will select the most suitable graphite material for our customers according to the ... normal lubricant material to improve the durability. 4.Therefore, carbon and graphite bearings, pistions, piston rings and sealing rings are normally used ... ,Pengjia Xiang,Laodaohe Town,Kaifu District, Changsha City,Hunan,China carbon bearings products