Review on TECHTOO Wall Mount Rack 6U: Adjustable Depth Open Frame 19 Inch Server Equipment Rack for Heavy Duty Network Setup by Andrew Britton

This is a pretty good product. I keep it. I wanted 20U but settled on 15U (no problem). If I set it up for screw mounts, it's only 13U because the adjustable frame pieces get in the way of anything full-width (>3 inches). If your elements aren't full-width and use expanding brackets, you might be fine. Otherwise great shelf.