... . 2,OEM service. 3,Ozone resistance,aging resistance,UV resistance. Rubber Silicone Stopper1, Material:NBR,CR,HNBR,ACM,SBR,EPDM,IIR,NR ... ,EP,Silicone,Viton etc.2, Hardness:Between 30~90 shore A3, Property ... your drawings or samples.8, OEM or ODM is welcomed. Rubber Silicone Stopper