... 4.High quality Timken Deep Groove Ceramic Ball Bearing Manufacturer Deep Groove Ball Bearing Description1) Ceramic bearings have excellence performance ... temp,low temp,electric insulation,high precision ballscrew set,valve balls for acid,alkali,salt,measure pumps,flowmeter. ... for acid,alkali,salt,measure pumps,flowmeter and valve ball plunger for deep well pump. Characterisitic: resistance ...