1. Ozone proof bellows cover. 2. Good insulation. 3. Certification: ISO9001:2008,TS16949,ROHS,etc. ... 4. OEM/ODM welcomed. Silicon rubber bellows cover descriptions: MaterialsSI, also NBR, SI, HNBR, ACM, SBR, FPM, CR ... directive, NSF, KTW, WRAS, etc.QC/QAWe have experienced quality control and assurance system, 30 QC technicians.ApplicationsUsed in mechanical, automobile ...