StarTech.com 2U Server Rack Shelf - Universal Vented Rack Mount Cantilever Tray for 19" Network Equipment Rack & Cabinet - Heavy Duty Steel - Weight Capacity 50lb/23kg - 22" Deep Shelf (CABSHELF22V)

These are hopeless if you're using them with anything else in your rack. That applies even if you're using them together in the rack. The issue is that the shelf base is not square with the mounts at either side. There is an overhang (underhang?) on the shelves as you can see on the right of the photo. My existing 3U shelf is square and can be seen on the left of the picture. Because of this overhang you cannot put these with something directly below them.I could have wasted 1/3 of a U (a rack hole) and spaced them out that way. That would work but would be a terrible waste of space. Especially given my moving to 2U shelves to fit more into my rack. I tried getting two of them to sit one above each other to no avail. I spent 30 minutes thinking I was doing something wrong. That was until I looked online and saw other people had the same issue. I only ordered these because they were available next day. Now I have to return them and order new ones from the manufacturer I normally use, Penn Elecom. They're cheaper and also available on Amazon but with a lot longer lead time.If you can afford to lose 1/3 of a U soacing them out then I'd imagine they're fine. I can't do that so back they go.

I bought this as I know Startech is a decent brand with products that will last for years.It was cheaper than alternatives and I knew it was a 2U shelf I wanted, but it seems very few people make 2U shelves at the shorter depth for a comms cab - especially at the price I wanted to pay! I'm pleased to say with some careful angle grinding/cutting I was able to get the perfect fitment and am very pleased. I've lost some rigidity by cutting off the rear folded edge, however for what I'm putting on it (router and small switch) it will be perfect.

Needed a smaller shelf for a wall mounted rack, hard to fine one under 10", this is great for small network boxes / modems etc.

Well finished product will all the fixtures required. Bolts arrive with washers integrated to save time. Solid feel and good depth of finish.

I don't know which measure the manufacturer was using, but it certainly is not standard inches. This is a strong product but the mounting holes are not drilled in the correct place. I had to do a lot of filing and fettling to allow the screws to pass though the holes into my standard 19" rack. I would not recommend as it does not meet its specification out of the box.