About this 3D model

I made this design while setting up my printer to adjust the first four layers on the print bed. With this test print, the first four layers become visible on the print bed. So that they can be judged on their quality. Allowing the printer to be better adjusted for over extruding and flow rate The design is available in four variants: 0.12mm, 0.16mm, 0.20mm and 0.28mm. Each layer rises by an equal size. design dimensions : X 20.00mm Y 80.00mm (0.12) Z 0.12mm/0.24mm/0.36mm/0.48mm (0.16) Z 0.16mm/0.32mm/0.48mm/0.64mm (0.20) Z 0.20mm/0.40mm/0.60mm/0.80mm (0.28) Z 0.28mm/0.56mm/0.84mm/1.12mm