HFS (R) Molecular Sieve Zeolite 3A 8X12m 500g

This is the best thing you can get for drying 3D printer filament, hands down. I've used maybe 100g of it so far. Humidity has stayed near zero for about 3 months. This jar is a lifetime's worth. If you're on the edge, DO IT.

A must have in any lab, great for drying solvents

Used in my Bambu P1S AMS. was able to achieve very low humidity level (less than 10%)

Good product. It would however be nice to have a resealable package since they are reusable.

Product came vacuum sealed in an aluminum foil package inside a yellow padded envelope which was sufficient for the purpose. The Molecular Sieve does an excellent job of removing water from Ethanol and are very easy to reconstitute for reuse by simply rinsing in warm water then bake dry at 200° for about 30 minutes spread out on cookie sheet and its ready to reuse.