... : NR,Silicone, NBR, EPDM, etc 3.Different sizes Product NameNR conveyor rollerCertificateISO9001:2008Country of OriginChinaAdvantagea. Ozone and chemical resistanceb. High temperature ... of valves and pipes, rubber seals, auto rubber parts, industry rubber parts, auto rubber parts, rubber roller used in the wrapping machine, printing ...