The strongest, most versatile, corrosion proof shelving system in the world. All polymer shelving constructed of advanced polymers and Type 304 stainless corners. Shelves adjust in 1" increments. One-piece solid mats offer maximum spill retention. Lifetime warranty against rust and corrosion. Built-in Microban antimicrobial product protection to keep the product "cleaner between cleanings". Includes 2 swivel and 2 swivel/brake casters.