Rubber gasket descriptions:MaterialsSI, also NBR, SI, HNBR, ACM, SBR, FPM, CR, BR, IIR, NR, IR, PU, etc, just as your request.Hardness30~90 shore A or IRHD.Temperature-100~250 celsius degrees, or as your request.PerformanceHigh and low temperature resistant, ozone resistant, aging resistant,...