... depend on customer's request. Blade Material: Zirconium Oxide (ZrO2).Handle Colors: black, red, yellow, green, blue or ... Quality ApprovalsBy Sea/Air/Express Property: ItemUnitInspection ResutlsComposition Wt% ZrO2+Y2O3≥99.5% Specific densityg/cm3>6.0Hardness(HV) ... Supplier in China.--Participating in instituting Chinese standards of ceramic knife.Our product pass ISO9001, SGS, FDA, LFGB testing If ...