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 ... low temperature resistant, ozone resistant, aging resistant, weather resistant, good insulation property, anti-toxic, good air-permeable, etc. Size and LogoAccording ...