... delivery 3.competitive price 4.long life Detailed information of ceramic roller bearing 6001:Material: ZrO2Usage: high precision,vacuum, high ... valve balls for acid,alkali,salt,measure pumps,flowmeter and valve ball plunger for deep well pump.Characterisitic: ... resistance to strong acid,strong alkali,salt and gas of deleterious,long life,high hardness,especially resistance ...