StarTech.com 1U Adjustable Vented Server Rack Mount Shelf - 175lbs - 19.5 to 38in Adjustable Mounting Depth Universal Tray for 19" AV/ Network Equipment Rack - 27.5in Deep , TAA (ADJSHELF)

Used for mounting a keyboard, mouse and monitor on a 2 Post rack and it's working great! I am sure this shelf could support much heavier items!

Writing this review after purchasing six of these over the years. I have a full size server rack that houses my home network and home theater gear. This is a very strong shelf. It's unlikely you'll ever put 175 pounds of stuff on this shelf unless you're using it for a non-standard purpose, such as storing bags of cement or bricks.I have two, 4U servers that are home-built, meaning they didn't come with rack rails. Though you can get generic rack rails, they never work correctly and are more trouble than they are worth. Those go on these shelves.I have a a Denon HT receiver/amp that weighs about 30 pounds. A regular, 2U rackmount shelf just bends and isn't safe. So that goes on one of these shelves too.There is a trick to installing these shelves in a rack and it helps big time if your rack has open sides like mine does. Only attach the front mounting ears to the shelf. You will need about 4U worth of space to slide the shelf into the rack with the front ears attached b/c the screws that hold the ears to the shelf stick out and won't clear the rack rails. You'll have to angle the shelf diagonally a little bit to slide it in. Loosely secure the front brackets to the rack rails. Loosely install the rear brackets on the shelf, leaving them loose enough to slide back and forth. Tighten the rear mounting ears to the rack rails. Tighten the rear brackets to the shelf. Now, tighten the front brackets. I recommend using a socket and socket wrench on the nut, while you hold the screw in place with a Philips screwdriver to tighten the brackets to the shelf. The brackets are what hold the shelf up. Tighten the snot out of the brackets and you'll never have a problem.The mounting ears are exactly 1U in height, meaning if you intend on mounting something directly underneath the shelf, you have to ensure the brackets don't sag downwards into the 1U space directly underneath it b/c it will interfere with whatever you're trying to slide into that space.Other than those quirks, these things are built like a tank. I've had 100 pound UPS's and servers that weighed almost that much on these shelves and they don't bend, break, creak or do anything but sit there and take it.Pre-pandemic these shelves were about 25% cheaper than they are now. But, everything has gone up in price. Welcome to the new reality, I guess. Highly recommend this rackmount shelf!

Solid rack shelf. While the shelf itself is of fixed length, the mounting brackets can be adjusted to proper depth. Which was pretty easy to do. 2 screws for each bracket (total 8 screws). Installing it in my rack was simple; probably took me an hour altogether. Though as you can see from my pics, I have full access from all sides. Might be more difficult to do in more enclosed racks.As you can see in the pics, I placed my tower server and other peripherals on the shelf. It's not flimsy, so I had no concerns if the shelf could support the weight or not.

Well built, but removing a star because they shipped me bolts and instructions for a completely different product.

I got these to hold our 1U network devices. The rails in our datacenter are really thin and bendy, and even a medium sized switch sags with just the single front brackets. So I installed these shelved under each pair of switch / firewall. Worked great.Installing these is pretty straightforward, you attach 4 corner supports on the rails, then slide the shelf in. There are 2 shorter rails, and 2 longer ones. So you have an option to have the shelf a bit recessed on either the front or back. The shelf itself is pretty light, but holds a ton of weight. We have two monster switches that weight about 40 lbs each, and will bend the rails without rear support. With these shelves, it not only helped with the sag, but made installing soooo much easier. No more trying to hold up a switch while you try to install screws with a shaky hand. You just set the switch on the shelf. Way easier. I'm going to use these with all our cabinets, even the ones with thicker rails, just because it makes installation faster and safer.

I found the Startech branded equipment many years ago and never looked back. This shelf is what I use in a 4-post rack and it is adjustable to the depth of the rack, which sometimes is 28" deep to 32" deep, this shelf has the arms that can extend perfectly no matter the length of the rack. I love how the arms wrap around the top and bottom of the shelf to hold it in place, even with one bolt if needed, but use the 2 for each side. I place two heafty servers side-by-side and have a standup UPS behind them and the shelf doesn't budge. This is a rack shelf I purchase every time, I never source or seek out any other brand, and they have never been anything less than perfect after 10 + years of heavy servers on them. The only time I will not buy this shelf is when StarTech stops making them, then I will be sad.

I use it to store my APC UPS, office jet on the bottom of my server rack. It holds the weight and does not flex.

Exactly what i needed. Came fast. Easy to install. Heavy duty. Works great!