... Certification: ISO9001:2008,TS16949,ROHS,etc. 4. OEM/ODM welcomed. Silicon rubber bellows cover descriptions: MaterialsSI, also NBR, SI, HNBR, ACM ... 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, weather resistant, good ...