1 universal rack shelf unit for installation non RALIS rack with bolt holes on the board.
In other words Tagra rack.
Besides the problem of availability of the brand, it is difficult for example, to align a BLUETUBE at the faade, with other units in a rack, because of the holes that are either too far too prs edge (or so you have another larger hole).
(That said, this also allows dcalage being protected buttons SETTING THE the front, so ...).
Good alignment with left and right edges against (with a little space on the ct of the case).
Price: around 20 Eur.