... 4.High quality Timken Deep Groove Ceramic Ball Bearing Manufacturer Deep Groove Ball Bearing Description1) Ceramic bearings have excellence ... salt and gas of deleterious, especially resistance to hydrofluoric acid,long life,high hardness,resistance to wear.Si3N4 Usage: ... ,electric insulation,high precision ballscrew set,valve balls for acid,alkali,salt,measure pumps,flowmeter and valve ball plunger ...