... rusted,never discolor; 4.Heat proof,Hygiene; 5.Abrasion resistance Ceramic Knife – High Density ZirconiaItem No.: JH3A1-P02,JH4A1-P02,JH5A1-P02 ... ", 6", 7" ceramic knife A seriesBlade Material: zirconium dioxide (ZrO2; also known as zirconia)Blade Colour: white, black, and coloured blades availableHandle Material ... better services to you. Thank you. 3-6 Rare Earth Ceramic Knife in ABS handle