... Materials: different kinds of rubber & plastic, such as Silicon, NBR, SBR, NR, CR, EPDM, and FKM Silicone O-ring Features:1 ... ) Materials: different kinds of rubber & plastic, such as SILICON,NBR,SBR ... ,, industrial parts, household parts, motorcycle parts,electronicsparts, gasket rubber, O-rings. 3) Processing methods: compression, injection, transfer, ...