... :NBR,NR,FPM,EPDM, silicone, SBR,PU Specifications: Molded seal(o ring oil seal stem valve seal rubber plug stopper)Materials: NBR, NR ... /machine useCharacteristics:ozone-resistant, high/low temperature-resistant, wearing-resistant, oil-resistant, voltage-resistant,ectSpecifications: not standard, OEM is welcome. Colors ...