... ,corrosion resitance 2.maintenance free full ceramic ball bearing of silicon nitride materia1.Full ceramic bearing made with ZrO2 have excellent performance as ... ,especiall high and low-temperature application,etc.,could be used in awful environment and specially condition,2.The rings and balls ... :PTFE, GFRPA66-25,PEEK,Phonemic Textiles Tube,etc. full ceramic ball bearing of silicon nitride materia