rubber screw plug 1. NR, CR, NBR, SBR, VITON, EPDM, HNBR, SILICONE, BUNA, AEM, etc. 2. ISO9001 3. Prompt delivery: 1 week rubber screw ... plug MaterialNR,CR,NBR,SBR, SILICONE,VITON,EPDM, HNBR, BUNA, etc ... CompoundCan be UL, FDA, ROSH or REACH approved, and free test slabs and hardness testers can be offered for customer's ...