Aging- resistant , ozone- resistant, oil-proof, acid/alkali -resistant ,voltage resistant and insulating ,etc. 1.Quality Certificate:ISO/TS16949,HG/T2196- ... 3.Material:EPDM ,MVQ ,or CR, etc 4.Advantage: Aging- resistant , ozone- resistant oil-proof, acid/alkali resistant ,voltage resistant and insulating ,etc. rubber sleeve