Leinuosen20 Pcs 1U Blank Mount Filler Disassembled Metal Panel Rack Spacer for 19 Inch Server Rack Network Cabinet or Enclosure, Black

Bought these to cover unused slots for my dad’s network rack. He managed to find a full 40U rack at a liquidators for super cheap and thought it was a good idea to just buy it, even though he really only needs 10-15U of space. Now with these, I can close up all the open gaps and make it look much cleaner from the front while not using all the slots. These are standard 19” rack mount covers for 1U each panel. They are solid and built well. No complaints whatsoever.