... NR, CR, EPDM, and FKM Rubber O-ring Features:1) Materials: different kinds of rubber & plastic, such as SILICON,NBR ... ,SBR,NR,CR,EPDM.2) Applications: rubber parts,, industrial parts, ... household parts, motorcycle parts,electronicsparts, gasket rubber, O-rings. 3) Processing methods: compression, injection, transfer, ...