PSA: this is a known scammer, do not buy

http://bitcoinscammers.com/cryptominer-pl/

https://forum.polmine.pl/index.php?topic=5230.msg47069 (multiple customers that have not received equipment, or received broken equipment, and have not been refunded)

Also, multiple reports on Reddit and here that it is just repurposed shelving, available in Poland for ~10 EUR (http://www.regallo.pl/regal-metalowy-140x70x30cm-4-polki-metalowe-bial,3,216,22)

And this is all besides the god-awful design of the case that clearly wasn't thought through at all.

tl;dr - shit design pushed by a scammer