... , NBR, NR,Silicone, etc 3.Different sizes Product NameRubber isolation base/shock blockCertificateISO9001:2008Country of OriginChinaAdvantagea. Ozone and chemical resistanceb. High ... ,EPDM ,SBR ,SR ,CR ,IIR ,etc.PackingInner packing is by plastic bag outer packing is by carton and woodenPayment termT/T ...