StarTech.com 1U Fixed Server Rack Mount Shelf, 10in Deep Steel Universal Cantilever Tray for 19" AV/Data/Network Equipment Rack with Cage Nuts & Screws, 44lbs Weight Capacity, 10" Deep - 1U Network Rack Shelf (CABSHELF1U10) - rack shelf - 1U

Add a sturdy, 1U server rack shelf into almost any rack or cabinet. This 1U rack shelf lets you add 10 in. of flat storage space to any EIA-310 compliant server rack or cabinet.
The durable fixed-rack shelf can hold up to 20 kg (44 lbs.) of equipment and is constructed using SPCC commercial-grade cold-rolled steel.
The 1U cantilever shelf lets you optimize your working space by giving you the ability to mount equipment to your rack instead of taking up desk or floor space. It's perfect for your SOHO (small office, home office) environment, server room or any other location with limited space available.
You can install the 1U rack shelf in your rack at any height, giving you a stable surface for placing equipment that's un-mountable or storing your tools.