. Add-On Shelving Units allow unit expansion to make the most of storage space. Includes 2 posts with leveling feet, 5 shelves, Snap-On sleeves and S-hooks to join units. Bright, chrome over nickel electro plating creates a brilliant high gloss finish. Open design maximizes air and light circulation and minimizes dust accumulation. Shelves easily adjust without tools and align accurately at 1 increments. Shelf clips snap on post, allowing shelf collar to slide over for a secure fit.