... soft 2,Super hardness 3,Suitable for dishwasher 1 Zirconia ceramic knife is made of special ceramics,finished product present ivory, ... sharp; 3.No rusted and discoloration; 4. white Ceramic knife 5,LFGB,EU,SGSCeramic Knife – High Density ZirconiaItem No.: JH3A1-P05,JH4A1- ... ,JH6A1-P05,JH7A1-P05Model: 3", 4", 5", 6", 7" ceramic knife A seriesBlade Material: zirconium dioxide (ZrO2; also known as zirconia ...