The Cambro ESR21E151 is a durable shelving ledge designed for Camshelving® Elements. Measuring 21 inches wide and 4-1/4 inches high, this end shelf rail kit includes one double level end rail and end brackets for easy installation. Constructed from high-quality polypropylene, it features a soft gray finish that complements various environments. This ledge enhances storage stability and organization, making it ideal for both commercial and residential use.