Talk about anything and everything relating to 3D printing for any category that you couldn't find!
Looks like you can measure the feature size in mms.

That's not millimeters, it's "mm" as is "Mmmm...cheese!"
BY FritzToch
Seriously, that GEM filament is terrible. I cannot get a decent print out of it, or if the print looks OK, the filament gets stuck or breaks. Please, newcomers to 3d printing: find different filament, any PLA filament, and make some sort of spool holder and use that instead of the included filament.