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tt 38s Polyester liner. High quality, diameter change liner for professional use. The unique multilayer structure guarantees that the liner does not stretch length. Membrane: polyurethane (PUR-HD) Material thickness: 3 mm Gap between the calibration rollers: 7 mm Suitable for lining pipes of DN70 (2¾'') - DN100 (4'') size Allows lining up to 90° bends without wrinkles Compatible with the following epoxy resins: Boldan Oy: BDA / BD / BDA + / BX / BE / BA / BC / B1 Packing size of approx. 50 m / roll Made in EU