The shelves have a double walled shelf perimeter and raised shelf edges that prevent items from falling off. Leveling feet maintain stability on uneven surfaces. The easy to assemble stainless steel shelving unit adjusts without tools and aligns at 1a increments on numbered post. Type 304, 18 gauge stainless steel shelves and posts offer added rust and corrosion resistance. 600 lb. capacity. Starter Unit has 4 posts, 4 shelves and shelf clips.Global Industrial