Quick adjustment and the strength of steel. Removable polymer shelf mats for easy cleaning. Quick-adjust shelves can be positioned in 1" increments along the length of the post. 15-year 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.