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