This system is constructed from industrial strength steel and features UltraZinc plating, which provides the same corrosion resistance and a similar shine to chrome plating. Shelves hold up to 300 lbs. each in units on leveling feet. These shelves are perfect for adding extra storage around the house, tidying garages, and organizing office spaces. Dimensions: Overall Height - Top to Bottom: 60". Overall Width - Side to Side: 30". Overall Depth - Front to Back: 14".