... , etc 3.Different sizes are available Product NameNR/CR/EPDM O ringCertificateISO9001:2008Country of OriginChinaAdvantagea. Ozone and chemical resistanceb. ... which maked a wide range of rubber products. We located in Xinjiazhuang Industry Zone, Tongji Office , Jimo , Qingdao City, ... industry rubber parts, auto rubber parts, rubber roller used in the wrapping machine, printing machine, etc. We have the ...