... ZirconiaModel: 3", 4", 5.5", 6.5", ceramic knife eriesBlade Material: zirconium dioxide (ZrO2; also known as zirconia)Blade Colour: white, black, ... and coloured blades availableHandle Material: ABS+TPR handleSize Available: 3", 4", 5.5", 6.5"Features: ... ensures a longer lasting cutting than other traditional steel knife.Hygiene: no smell or oxidation on the blades ...