Dunn Industries Inc. is a custom extrusion house specializing in single- and multilumen tubing. We run all materials except PVC silicone and the fluoropolymers. We run PEs; nylons; Pebaxs; PUs, acetal PC, natural and loaded; tungsten BAS04; and Bis Sub in any color of the rainbow. Bump tubing is offered in single- and multilumen. Tubing can be cut or spooled. Dunn also makes acetal mandrel in 0.020 to 0.250 tolerances determined by size.