The Metro X556PG4 48" 4-Tier NSF Mobile Polymer Shelf Kit is a versatile and durable storage solution tailored for commercial kitchens and restaurant environments. Part of the MetroMax® 4 series, this mobile unit is built with rust-resistant polymer construction, ensuring long-lasting performance even in harsh conditions. With a 500 lbs capacity per shelf and 800 lbs total unit capacity, it's designed to handle the demands of busy kitchens while maintaining stability and mobility. The kit includes four adjustable, louvered shelves that can be easily attached to the four polymer posts with wedge connectors, allowing for customization to fit your storage needs. The unit's mobile design features two swivel casters for easy movement and two braked casters for secure positioning, making it perfect for navigating tight spaces or securing the unit when in use. Ideal for NSF-rated storage requirements, this shelf kit combines practicality with durability, ensuring it meets the needs of professional kitchens without compromising on quality or performance.