Plastic tubing PEN-4X0,75-SI-500 standard O.D tubing, for QS plug connectors, CN and CK fittings, polyethylene (not approved for use in the food industry). Outside diameter=4 mm, Bending radius relevant for flow rate=20 mm, Inside diameter=2,7 mm, Min. bending radius=10 mm, Tubing characteristics=Suitable for energy chains in applications with high cycle rates