SPECIFICATION: OD: 7.5MM L: 42MM Main component: 99%Al2O3 properties Density: 3.8g/cm2 water absorption0 sintering temperature1700 oC physical propertyHardness: 3500HV Rupture strength: 3000Kg/cm2 pressive strength: 30000 Kg/cm2 thermal property Maximum service temperature: 1500 oC Thermal shock resistance: 220T (oC) conductivity: 31.4--15.9W/m.k(25--300oC))