... Hygiene,hard and sharp; 3.No rusted and discoloration; 4. white Ceramic knife 5,LFGB,EU,SGSCeramic Knife – High Density ZirconiaItem ... P05,JH5A1-P05,JH6A1-P05,JH7A1-P05Model: 3", 4", 5", 6", 7" ceramic knife A seriesBlade Material: zirconium dioxide (ZrO2; also ... 2mm130mm334mm 1,Refining made by Zirconium ceramics materials which called “ceramic steel”, have the properties as sharp-edged, wearable, rust ...