The SS506-BG is a subframe manufactured by Selco, a company that specializes in the design and fabrication of aluminum extrusion and custom aluminum profiles. The subframe is made from 3 extruded aluminum components, two of which provide support for the other parts of the system, while the third provides a mounting point for various optional components, such as a sunroof, a light rack, and/or a seating area. The SS506-BG features a unique interlocking design that provides strength and stability, as well as a streamlined look. These components are available in a variety of colors and finishes, including an anodized finish for extra protection and durability.