The MetroMax® 4 Add-On Shelving Unit is designed for durability and efficiency in any storage environment. Measuring 30"W x 18"D x 74"H, this all-plastic shelving unit is rust-proof and features an impressive weight capacity of 800 lbs per shelf, with a total unit capacity of 2000 lbs. It includes four open grid polymer shelves equipped with removable shelf mats for easy cleaning and maintenance. The unit comes with a bag of four wedge connectors for secure shelf attachment, two sturdy polymer posts, and eight "S" hooks for seamless end-to-end configuration. Enhanced with Microban antimicrobial product protection, this shelving unit is ideal for maintaining a hygienic storage space. NSF certified for safety and quality, it is designed for quick assembly and long-lasting use.