... 3.widely temperature scope for using 4.good quality rubber flap / rubber bumper / rubber flapping 1)We have kinds of material ... nonstandardBrand Nameo ringMaterialNBR,HNBR,EPDM,SILICONE,VITON,FLS,FFPM,PTFETemperatureCommon: 20~100degree centigrade;NBR(-40~120C),VITON(-25~300C)CertificateCE, ROHS ... as requestSample lead time7 daysCarton Size47*38*34cmOEM/ODMwelcome rubber flap