1.ISO9001:2000 2:Resistance:Above 280C 3:Hardness:50 ... pressure high environment.characters:high tear resistance,high temperature,resistance(above 280°C),degree of hardness ... between 50-60,the corrosion resistance,aging resistance,Non-toxic and tasteless,high elastic ... performance,high flatness, high pressure resistance,better Separation effect,pro-environment performence.By ...