... shape ; 3.heat-resistance,water-proof,flat ; 4.speaker rubber about us 1)We mainly produce rubber gaskets ,auto rubber seal strips, door and furniture ... oil / fuel / water resistant NR, SBR, VT, BR, NBR, CR, IIR, EPDM and SIL, we also offer custom molded products as ... , SBR, HNBR, EPDM, SILICONE, CR, FFKM, etc.2)Rubber washer material chooses to NBR butadiene-acrylonitrile rubber of the most common use ...