This simple cover closes an open 3.5" pc slot, normaly used for a standard cd or dvd drive (about 149.6x43mm). My pc case is relatively thick with 1.6 mm - the model may not fit in cases with thinner material.
I printed it with 0.2mm layer hight, a 0.4mm nozzle and supports under the clips on my prusa mini in PLA.
The author hasn't provided the model origin yet.