... plug Materials: different kinds of rubber and plastic, such as SILICON, NBR, SBR, NR, CR rubber gasket and plug Features: 1) ... Materials: different kinds of rubber and plastic, such as SILICON, NBR, SBR, NR,CR,EPDM ... machine, transfer molding machine, extrusion machine 3) Applications: The rubber seal circles accessories for household and public sanitary equipment4) Processing ...