This 25m long ink tube resists highly aggressive chemicals. The inner diameter is 5.5 mm and the outer diameter is 8 mm. The tube is plasticizer-free and reduces the risk of contamination of the inks. The exceptionally smooth inner surface inhibits particulate build-up. This high quality solvent resistant tube can be used on NUR Fresco printers amongst others for connections that don't require very flexible tubes such as Tygon.