HM90 Size: 90x1230 Membrane material: PP UPVC PES Mode: Internal force and External force End cap airproof material: Oxygen resin Cutoff Dalton: 10,000~100,000 Center pipe material: UPVC, ABS, PMMA Max.Working pressure: 4 Bar Pure water flow rate test under water temperature 25C, inlet water pressure drop 2 Bar.