Our modulo3 Shelves are formed from 22 gauge galvanized sheet steel with clip on plastic end caps to protect the corners. Each shelf comes with an anti-slip mat to prevent loose items from sliding around during transit. Our shelves come in a variety of depths including 5 3/8", 7 1/4", 10 3/8", and 13 1/4". Optional dividers and plastic bins are available to compartmentalize the shelves for small tools, fittings, and other consumables.