This is a mini-ITX enclosure. A PC without a separate video card. No bolts are used to connect the body halves. The power supply can be attached to the lower half of the housing of any standard. This kit is designed for an SFX power supply. For ATX and others, you will have to make your own power supply module. Also, the presence or absence of an air duct depends on the PSU. The set includes an air duct for the SFX. Also depends on the PSU mounts external USB 3 ports, if you need, expect, in the set mount for SFX, if you want to mount the USB to the power supply. The upper case cover and cooler grille depend on the specific CPU cooler and its location on the motherboard, this kit is designed for the PcCooler GI-46U cooler and the Asrock A520M-ITX motherboard. There is no space for 2.5-3.5 disks, only for m.2 disk.

Used FDplast PETG filament, air duct - is FDplast SBS.

https://www.thingiverse.com/thing:4811257 Added an external SATA port for fast connection of 2.5-inch disks up to 15mm thick.