Review on 🔧 UCTRONICS Raspberry Pi Rack 1U - 19-inch Rackmount Supporting 1-4 Units, Compatible with all Raspberry Pi B/B+ Models by Mike Davis

These little blank panels are quite expensive for what they are but I wouldn't mind if they did a good job. They don't form a completely airtight seal and due to the way the flex is done they allow a lot of air past the liners. Normally this wouldn't be a huge problem, but a rack that will soon be outfitted with gaskets and filters for use in dirty environments requires a little extra work with tape that could have been used for a lot less in the first place!