... DN3000MM (1 1/4"--120") Material:EPDM, NBR, NR Rubber Expansion Joint: Size: DN32MM--DN3000MM (1 1/4"--120") ... DIN2501, BS4504 Material:EPDM, NBR, NR High-pressure Rubber Expansion Joint: Size: DN32MM--DN3000MM (1 1/4"--120 ... ")Rubber material: EPDM,NBR, NRRubber sphere: Single sphere, Double ... ,oil,acid,alkali etc EPDM double sphere rubber expansion bellow joint