Rubber airproof product:SIR, NBR, CR, NR, SBR, EPDM, FKM, IIR, BR ... Usage:micro-oven sealing ring. Certificate:ISO 9001 ROHS Rubber airproof product (Rubber product)Features:1) We produce all kinds of ... , NR, SBR, EPDM, FKM, IIR, BR etc..Performance for rubber airproof product:Durable in liquid material, mineral oil and lubricantGood resistance ...