1.we are the pioneer of ceramic bearing in China 2.material is SSiC 3.full ceramic bearing 4.we are manufacturer ZrO2:Usage:high ... for acid,alkali,salt,measure pumps,flowmeter and valve ball plunger for deep well pump.Characterisitic: resistance to strong acid,strong alkali ... ,high hardness,especially resistance to wear,high modulus of elasticity ceramic ball bearing