... Natural delicious,lossless 3sharpness can keep long Specifications1. zirconia ceramic knife made of Zirconium; 2.Health,Hygiene,hard and sharp; ... 3.No rusted and discoloration; 4. white Ceramic knife 5,LFGB,EU,SGSCeramic Knife – High Density ZirconiaItem No.: JH3A1-P05,JH4A1-P05 ... densityg/cm3>6.0Hardness(HV)HRA>87Thermal expansionCoefficient(20-400)(10-6/K)9.6(20~400)Elastic modulisGPa200~250Fracture ...