... week rubber screw plug MaterialNR,CR,NBR,SBR, SILICONE,VITON,EPDM, HNBR, BUNA, etc.Hardness30degree-90degreeMode of productionCompression and injectionProduction ... injection machines including 150T,200T,250T, 300T and 500TSize/colorThe size and color can be designed by the customerRubber ... UL, FDA, ROSH or REACH approved, and free test slabs and hardness testers can be offered for customer's ...