Printed in PLA. Works on a variety of spools.

Looks great, nice and slim, and works great too. Printed in PLA, haven't experienced any sticking issues yet. Top screw was fine, I just used a bit from a screwdriver set to hand tighten it and then finished it with the allen/hex key included with the printer. Bottom screw really didn't want to thread at first, but that's a printer build issue.