... good quality and low price 5.good hardness Zirconia ceramicsZirconia ceramic has high toughness,high bending strength ... ball, grinding medium, nozzles, ball valve and seat, zirconia moulds, fan axes, draw bench mould, incision tools, ... wearable knives and other wearable accessories.Zirconia material parameter: ItemTest ConditionUnit&SymbolZirconia CeramicThe main chemical ingredientZrO2 ...