POM filament that I ordered almost by accident has arrived. Manufacturer is FL-33, diameter = 1.73 mm, and the quality is...awful...

It is tubular in some places. I don't expect it to print well in the first place, but the bubbles inside can futher turn my prints into a mess. It won't (hopefully) stop me from doing electrostatic adhesion experiment, nevertheless.

I have a couple of other spools from FL-33 (ABS, PLA), and they are OK.