The Metro MXTTM21S MetroMax Top-Track Mobile Unit Kit is a specialized solution engineered for wet or corrosive areas, ideal for industries requiring robust and resilient storage systems. This mobile unit kit is 21 inches wide and includes key components such as four MX74UP 74-inch high corrosion-proof posts, ensuring durability and longevity in harsh environments. It also features four bumpers and four roller assemblies to enhance mobility and impact protection. The kit is equipped with two caster channels and four plate casters, facilitating smooth and reliable movement of the unit. It is designed to be compatible with MetroMax 4-inch and MetroMax Q-inch shelves, though these are sold separately, allowing for customizable shelving configurations tailored to specific storage needs. The inclusion of NSF certification emphasizes its compliance with stringent health and safety standards, making it suitable for commercial and industrial applications that demand rigorous hygiene. The Metro MXTTM21S MetroMax Top-Track Mobile Unit Kit is an essential asset for sectors requiring dependable, corrosion-resistant storage solutions with flexible mobility capabilities.