1. Various customized configuration of Muli-lumen tubing are available. 2.Lumen shapes can be designed to meet ... )Numerous lumen shapes.DescriptionDemax Medical Extrusion manufactures custom multi-lumen tubing in virtually any configuration. The number, size and configuration of ... by the outer diameter, wall thickness, and material. Multi-Lumen tubing consists of two or more lumens. Lumen shapes can be ...