Abstract: A passage is formed between bases stamped, formed and laminated U-shaped channels. Interlocking locating features are formed into the inner and outer stamped and formed layers. Inner and outer components are attached by welds, glue, snap-fit or interference fit. Inner and outer components can be made of the same material and thickness or from different materials and thicknesses as needed to achieve the desired mechanical properties such as shear strength, bending strength, torsional stiffness or flexibility and longitudinal stiffness or flexibility. The materials may vary in thickness or composition along the length or height of the device to achieve the desired mechanical properties.