high quality vibration damper 1.Matreial :NR FKM EPDM silicone etc 2.Package :pvc bag and carton box 3.Certificate :ROHS ISO high quality ... vibration damper1, Materials: NBR, silione, NR, FKM,EMPD etc.2 ... could option the color you like on vibration damper .5, We promise the high quality but competitive price and delivery on time ...