The Cambro CBA244284S4580 Camshelving® Basics Plus 4-Tier Add-On Shelving unit is designed to extend your existing Cambro starter shelving unit, maximizing storage in tight spaces. This versatile add-on unit features 4 solid shelf plates, each with a 600 lb capacity (top shelf 400 lb), and a total unit capacity of 1,800 lbs. Constructed from durable polypropylene, it resists rust, corrosion, peeling, and scratching, maintaining a brushed graphite appearance that matches the starter unit. Suitable for hot dishrooms, walk-in freezers, coolers, and dry pantries, it operates safely in temperatures ranging from -36° to 190°F, making it ideal for commercial kitchens. The preassembled post connectors and wedges allow for easy assembly in L, T, or U configurations, ensuring a seamless fit with your existing setup. Whether you need to increase storage in a busy restaurant or a large-scale catering operation, this add-on unit delivers practicality and durability, helping you maintain a clean, organized workspace while meeting the demands of professional kitchen environments.