Corrosion resistant finish for wet or high humidity environments with a 12 year warranty against rust and corrosion. Microban ® antimicrobial is built into the finish to keep the product "clenaer between cleaning". *Weight load capacities are for evenly distributed weight: Per Unit (with four posts) Stationary unit: up to 2,000 lbs. (907 kg) Mobile unit: typical capacities are 600 - 900 lbs. (272 - 408 kg) and will depend on casters selected. Per Shelf - Shelves up to and including 48" (1219 mm) long: 800 lbs. (363 kg) evenly distributed - Shelves 54" (1370 mm) and longer: 600 lbs. (272 kg) evenly distributed