Twin Sphere Rubber Expansion Joint Features: -Double sphere allows more compression,elongation and deflection -Small force required to cause movement -Precision molded of synthetic rubber&nylon -Excellent ability to absorb vibration and sound -Perfect corrosion resistant -Using floating flange ,easy to install EPDM,NBR,NR, CSM,VITON,SILICON. Size:Size: DN32-DN3000 Pressure: PN10,PN16,PN25 Pressure Test: 15Bar, 24Bar,37.5Bar. End Flange:DIN2501, BS EN1092, BS4504PN16,JIS10K,ANSIB16.5 Flange You can refer to http www dot hiwaflow dot com for detail specifications.or send email to sales1 @ hiwaflow. Com