model units are [mm]
EDIT 09.06.2017 new stl models added:
"_inch" for 1/2" (12.7mm) balls
EDIT 02.07.2017 new stl models added:
"_D12" for 12mm balls
Printer Brand: Prusa
Printer: [Prusa Mk2]
Rafts: No
Supports: No
Resolution: 0.15
Infill: 30%
Notes:
The author hasn't provided the model origin yet.