calibration sphere —

Founded calibration sphere models & stl files for printing
Hex Vase
bbo
Z heigth probe
saulhbt
Wire Gauge
DIYhans
Writescad
HarlanDMii
Tsphere  Arrow
Ramon-97
Trideltoid Vase II
longtemps
SphereBot holder
begerowiec
PhotoBot
ThinkMaking