Quantum stainless steel add-on kits are available to make a continuous run of shelving in a straight line by sharing posts with a stainless steel starter unit. Add-on units can also share posts in a back to back situation as well as an l shape for usage in a corner of a room. While posts are shared the weight capacity does not diminish with the usage of two s-hooks per shelf level. Features . Product type - Wire shelving add on unit.. With 4 shelves.. Finish - Stainless steel.. Outer Dimension - 24 x 36 x 74 in.. Load - 800 lbs.