Endless shelving possibilities. The D3 Add-On unit pairs with the D3 Starter unit to expand your storage options. It comes with four removable steel shelves in your choice of white or grey. Brass details and leveling feet keep things classy and pragmatic. Available in walnut or white painted ash with white or grey shelves. *The D3 Add-On cannot be used on its own and requires attachment to a Starter unit.