... low price different types and sizes Different colors silicone rubber seal as per design 1, Material:NBR,CR ... ,SBR,HNBR, ACM,EPDM,IIR,NR,EP,Silicone,Viton etc.2, Hardness:Between 30~90 shore ... resistance,weathering resistance,Ozone resistance etc.4, Certification:ISO9001:2008,ROHS,FDA5, Packing: plastic bag&carton box ... OEM or ODM is welcomed Different colors silicone rubber seal as per design