The strongest, most versatile, corrosion proof shelving system in the world. All polymer shelving constructed of advanced polymers and Type 304 stainless corners feature removable, easy-to-clean shelf mats. Shelves adjust in 1" increments. Lifetime warranty against rust and corrosion. Built-in Microban antimicrobial product protection to keep the product "cleaner between cleanings". Starter units consist of four posts and the indicated number of MetroMax i shelves.