... )heat resisting 4)fast delivery Custom NR rubber seal ring:1.Product NameNR rubber seal ring2.Country of OriginChina Mainland3.Advantage A. Ozone ... seals, oil seals, hydraulic seals, rubber sheet, rubber mat, O-ring, auto and motorcycle parts, oil drilling and mining rubber parts ... products. Thematerial of these products are NBR, NR, EPDM, FKM, SILICON RUBBER,CR, SBR, EP, IIR etc.Thank you very much ...