Coextrusion is often associated with the extrusion of multiple (two or more) layers of material simultaneously to produce multilayered tube. Coextrusion may also include extrusion of a radiopaque polymer stripe along the sidewall, intermittent extrusion of distinct polymers along the length, and various other combinations in which two or more materials are extrused into a single tube construction. Coextrusion is invaluable for lean manufacturing of components that would otherwise require assembly of distinct parts.