... :EPDM,NBR,SILICONE,CR,NR 3.Used in:automobile,industrial product etc 4.SGS ROHS 5 NameRubber ProductMaterialNBR,NR,EPDM,SILICONE ... ,CR,BR,SBR,HNBRCertificationISO 9001:2008 ISO 14001:2004Passd inspections of SGS, PONY, INTERTEK, CTI, etcEnvironmental Complaince ROHS,REACH,etc Size ... Customized according to your Requirement2.Designs and Specification are Accepted Rubber Rings of Ink-Box product