... ,JH6.5E1-P02Model: 3", 4", 5.5", 6.5", ceramic Santoku knife B seriesBlade Material: zirconium dioxide (ZrO2; also known as zirconia ... diamond, which ensures a longer lasting cutting than other traditional steel knife.Hygiene: no smell or oxidation on the blades will transfer ... time and provide better services to you. Thank you. 4 inch non-stick ceramic santoku knife