The Cambro ESR18423151 is a durable shelving ledge designed for Camshelving® Elements. Measuring 18 inches wide, 42 inches long, and 4-1/4 inches high, this kit includes one double level side rail and two double level end rails, along with the necessary side and end brackets for easy installation. Constructed from high-quality polypropylene in a soft gray color, it provides reliable support and organization for your shelving needs, enhancing both functionality and aesthetics in any storage space.