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 ... -S, Gum Rubber,HNBR, ECO/Epichlorohydrin5, PTFE Lined or Viton Expansion Joints for Chemicals & Solvents6, general presure:DN32-DN400:2.5MPa ...