The Wire Shelving Add-on Kit is designed to expand the shelving area for shelving starter kits and the two units are joined together by sharing a set of shared posts.Features. Each unit is supplied with 2 posts 5 shelves and 8 S-hooks. Once joined units can be configured back to back in a straight line or at right angles. Load Capacity - 800 lbs.. Finish - Chrome. Outer Dimension - 21 x 48 x 86 in.