This is an 'extrusion and assembly tolerance test' designed to check the minimum visible extrusion capability and the minimum distance required to assembly pieces working with a 0.40mm standard nozzle.
The units of the numbers below the extruded shape are expressed in (mm).
Nozzle used: 0.40mm
Print Settings:
Infill: 15%
0.15mm Quality
Supports: None
Used Filament: 16g - PLA
Time: 1h 28min
The author hasn't provided the model origin yet.