Use;
I purchased two 1U Thon Rack Panels for my Zaor Miza 88 XL Oak/grey workstation as it houses three banks of 4U racks. I knew I wouldn't fill the entire rack space.. as much as I wanted to however these rack panels make for an elegant solution instead of seeing through to the back of the racks.
You can add or remove them, meaning access to your racks is excellent, they are made of decent quality steel and finished to perfection, they really do finish off things and give for a professional look.
Practical, they look great and they are superb value for money, I would recommend these to finish off your rack whilst you wait to add more toys in the future.