Unlike other wire shelving on the market, our add on chrome wire shelving unit is certified by the National Sanitation Foundation International. High quality chrome finish is very attractive and durable. Open wire construction reduces dust build-up, allows free light and air circulation, increases sprinkler effectiveness and improves visibility. Fast and easy to assemble. No tools required for assembly. Each shelf is adjustable in 1" increments. Each add on wire shelving unit is priced including: 2 posts, 4 shelves, 4 adjustable feet, 8 add-on hooks and 8 shelf clips. Please see the Extra Shelf page if you are looking to add extra shelves to your add-on unit. If you do not find the size you are looking for on our site, do not worry, there are many other sizes available by calling us directly at 800-404-RACK