... rubber Shape: Accordint to your blueprint OEM silicone rubber gasket for bottle stopper: 1, Material:NBR,CR,HNBR,ACM, SBR,EPDM,IIR ... resistance etc.4, Certification:ISO9001:2008,ROHS,FDA5, Packing:plastic bag&carton box or according to your requirements.6, Application:electronic ... .8, OEM or ODM is welcomed. OEM silicone rubber gasket for bottle stopper