Silicone Rubber Plug 1,FDA,ROHS Certificated. 2,OEM service 3,Ozone resistance,aging resistance,UV resistance. Silicone Rubber Plug1, Material:NBR,CR,SBR ... , EPDM,IIR,NR, EP,HNBR,ACM,Silicone,Viton etc.2, Hardness:Between 30~90 shore A3, Property ...