calibration rectangles —
Founded calibration rectangles models & stl files for printing
HD_Creator
Breaks'n'Makes
Boyson-IPL
jq910
BrianGrossmiller
BrianGrossmiller
MadLabs
nakwada
michaelbourque
rayz_tech
Amos491
clait
Baumino
Phaedrux
zapta
WidescreenJohn
Wilko
DanielNoree
SeppoTheFish
Prusa Research