... discoloration; 4,Health:Without heavy metal; 5,Abrasion resistance Ceramic Knife – High Density ZirconiaItem No.: JH3A1-P01,JH4A1 ... .0mm130mm283mm7-inchChef’s Knife178mm42mm2.2mm130mm308mm Advantage:1,Healthy:Ceramic is stable pperformance,no chemical reactions whtn contact ... colors and testes. So,the fruitsis more beautiful for using ceramic knife cutting fruits than metal knife naturally. 2 ...