Easily machined 6105-T5 aluminum alloy rail can be cut to fit and assembled using common shop tools. Drop-lock feature tightly holds fastened bars together. Suitable for factory automation, machine guarding and enclosures, workstations, tooling specialties, machine frames, carts, shelving, and displays. Description: Draper, Inc. Viewing surface snaps to the back of a 1-1/2" extruded aluminum frame with a black powder coat finish. The frame is visible and serves as a black border around the perimeter of the image area. Add optional velvety black textile, Vel-Tex, to eliminate Aluminum does not let light, smell or taste in or out, making it ideal as a packaging material for foods, beverages and pharmaceutical products. And, unlike steel, aluminum can be extruded. The word “extrusion” is derived from the Latin word extrudere, meaning “to thrust” or “to push”.