This is a small fume extractor for my bench. Mostly used to remove fumes while soldering electronics. It uses an easily available 1/4" carbon foam filter cut to size. The fan is a 40mm x 40mm x 28mm 12v computer fan. I used a USB-C adapter that provides the 12v from a good-quality USB-C power adapter. Not all power adapters provide 12v.

Use the following links to start your search:

Power delivery board: https://www.amazon.com/usb-c-power-board/s?k=usb+c+power+board

Fan: https://www.amazon.com/s?k=40mm+x+40mm+x+28mm+12v+fan

Filter: https://www.amazon.com/s?k=carbon+filter+1%2F4%22