Box for USB step down module, charger

I bought couple of cheap USB step down modules on aliexpress. They can be powered by DC 6-24V and output 5V and I think about 1.5A without cooling.

I designed a box for them. The box is made up of two parts
* bottom part - usb_charger_bottom.stl
* cover:
* simple, without ventilation holes usb_charger_top.stl
* with ventilation holes vent_usb_charger_top.stl

The cover is designed to be joined with bottom part with M2 screws.