1,made from Zirconium (94.4%min); 2,sharp blade ... to diamond Ceramic Knife – High Density ZirconiaModel: 3", 4", 5.5", 6.5", ceramic knife eriesBlade Material: zirconium dioxide (ZrO2; also known ... blades availableHandle Material: ABS+TPR handleSize Available: 3", 4", 5.5", 6.5"Features: Our ceramic knives are made of ZrO2, the ... and provide better services to you. Thank you. 6.5 inch ceramic knifes