... oxide (ZrO2; also known as zirconia)Blade Color: white, blackBlade surface: matte(optional Satin)Handle color: black,red,yellow, purple,green,blue or ... taste and smell.--> Anti-corresion,never rust ,keep food orginal color and flavour,enviroment-friendly.--> Soft touch ,easy hold handle ... of physical engineering science5.Factory Property:6. Company Certified: 3 inch stailess steel handle ceramic knife