I made case for TBS ND filters because I have them always only in the paper bags with which they came in so... There is a lower part and an upper part, and in both parts are holes for 5*2 neodymium magnets. (glue them in)
TPU frames for your TBS ND filters https://www.thingiverse.com/thing:5967580
Printer Brand:
Creality
Printer:
Ender 3 Pro
Rafts:
Doesn't Matter
Supports:
No