HO Code 100 with black ties and nickel silver rail. Contains 5 pcs. of 3' flex track sections. Super-Flex Track is Atlas' most popular product, known worldwide for its versatility and, of course, its flexibility. The innovation, which remains unparalleled to this day, was patented by Steven Shaffan, Jr., the founder of Atlas Tool Co.. What makes Atlas Super-Flex track so unique is that unlike many other types of curvable track which tends to kink when flexed, Atlas' can be formed and re-formed until you arrive at the desired shape. Like all Atlas track , Super-Flex is a high quality track made with injection-molded plastic and premium nickel silver rail. Atlas' Super-Flex track is a product you will enjoy using as you create your model railroading masterpiece. Super-Flex track comes in approximately 36" (3 feet) sections, and can be easily bent and shaped to form curves of any radius. Ideal for realistic spiral easement curves. It can be cut to any needed length with any saw including the #400 Modeler's Super-Saw.