... price 2.Fast delivery 3.Market.America,German,Italy,Japan,Korean CERAMIC BALLZrO2 ceramic possesses high strength, high ... hardness, high rigidity, high toughness, high wear resistance, self-lubricity and other features. In the application of ... it is used as valve ball in petro-chemical, metallurgy, papermaking, electro-planting and other fields. ZrO2 ceramic ball