... for Auto parts/food grade silicone gaskets/White Silicone GasketMaterialNR, NBR, SBR, EPDM, IIR, CR, SILICONE, VITONHardness20~90 Shore APacking ... countries and regions.InspectionIQC, IPQC,FQC,QAFeature of silicone washer:Good abrasion resistance, restorative, high temperature proof ... transparent. And any shapes, round, square, oval silicone washers are ok for providing.welcome to customize.Production ...