Specification: according to drawings or samples: precision & plusmn; 0.01 & have spent Density: 3.7 hardness: los type hardness HRC93 (HRC60) steel knife hardness change strength: 300 mpa elastic modulus: 380 gpa high temperature: 1200 ℃ breakdown strength: 15 kv/mm resistivity: 1015 / & Omega; M.