COLLIN tube lines are used for the production of multi-layer multi-lumen resp. plastic tubes for medical applications. The spectrum of diameters ranges from thinner than a human hair (<100 µm) up to approx. 5 mm. By means of coextrusion, the properties of the tubes, with a design of up to 5-layers, are adapted to the requirements of the field of applications.The inner geometry of COLLIN Medical Line tubes ranges from simple mono-lumen up to multi-lumen tubes, which contain up to seven channels.