... ,ISO 9001 Certification; 4,No metallic taste 4inch Ceramic Knife – High Density ZirconiaItem No.: JH3B1-P01,JH4B1-P01, ... JH6B1-P01Model: 3", 4", 5", 6", 7" ceramic knife B seriesBlade Material: zirconium dioxide (ZrO2; also known as ... ensures a longer lasting cutting than other traditional steel knife.Hygiene: no smell or oxidation on the blades will ... you. Thank you. 4 inch sharp ceramic utility knife