1,single sphere rubber expansion joint 2,rubber expansion joint 3,ISO9001 and CE Certificate 4,do OEM single sphere rubber expansion jointSpecification:1, DN32-DN30002, Flange connection3, standard: Flanged ... /Perbunan, Hypalon/CSM, Chloro-Butyl/IIR, Natural Rubber, Neoprene/Chloroprene, SBR/Buna-S, Gum Rubber,HNBR, ECO/Epichlorohydrin5, PTFE Lined or Viton ...