Tile spacer , 6 types.
STL 2mm
STL 3mm
STL 4mm
STL 5mm
Ask for other spaces.
16*6 Types 2mm = 96 printed = 10h55mn, 27,58m, 1,57 €
Also upload it into https://www.thingiverse.com/thing:5360150
The author marked this model as their own original creation.