Review on 🔌 StarTech.com 8U 19" Wall Mount Network Rack - Adjustable Depth 12-20" 2 Post Open Frame Server Room Rack for AV/Data/ IT Communication/Computer Equipment/Switch Rack with Cage Nuts & Screws (RK812WALLOA) - Enhanced SEO by Julie Brown

Very happy with this shelf adjustable in depth, just note you have to remove 16 bolts/nuts (both sides and top/bottom). No sagging even after I loaded all the hardware. I like open frame racks so you can access the back/side and cool gear. Comes pre assembled to the shallowest depth, also includes a small bag of nuts and cage bolts which I used for some of the lighter items I installed such as the patch panel and extension - I ended up using the thicker bolts I have for which had switches and the firewall that was slightly heavier.