QiaoYoubang 2 Pack of 3U Vented Blank Panel - Metal Rack Mount Filler Panel for 19in Server Rack Cabinet or Enclosure, Black (3U)

The quality and fit and value

These did seems well made and would probably last. After making my box there was no room for these panels, so I returned them. But if you got them, I am sure you'd be happy with them

I did another review for the 2u of the same exact product. They aren't black. They are gray. If you want black, be prepared to paint it. Pic is of the 2u but they are exactly the same color.

I got these to fill some open slots in my wall mount server rack. They do just that. fit was perfect and holes line up correctly. I used one at the top of my rack and 1 at the bottom to allow a bit more airflow. It's a small rack so you can usually never use the top 2U since the fan sticks down too far. Great product.

Good quality. The top and bottom both have a rolled lip, whereas cheaper stuff may only have one (or none). There is not a ton of net free area (I'd ped it at about 30% or so), but they look good and allow for some additional air circulation. I have them since it is recommended to leave space between rack mounted amplifiers.