The strongest, most versatile, corrosion proof shelving system in the world. Removable polymer shelf mats for easy cleaning. Shelves can be positioned in 1" increments along the length of the post. Lifetime warranty against rust and corrosion. Microban antimicrobial product protection is built into the finish to keep the product "cleaner between cleanings" Consists of 5 shelves (4 open grid, 1 MetroMax i solid), 74" posts, wedge connectors, and polyurethane casters.