... .4mmMaterial:NBRRosh,SGS are availableRubber MoldingRichuang Co., Ltd. is a manufacturer specialized in producing SI, CR, EPDM, NBR, NR, SBR, IR, ACM ... appliance, toys, automobiles, commodity and other fields. Our company have a group of professional technicians andadvanced production inspection equipments, under the ... advanced productive technology to complete our rubber production. O-ring in stock