hole size test

the stl has these params:
diameter_start = 1.4;
diameter_step = 0.05;
diameter_end = 1.85;
outer_diameter = 8;
box_width = 10;
box_height = 10

which means that it has 10 ((1.85-1.4) / 0.05)+1 holes, diameters are: 1.4mm, 1.45mm, 1.5m, 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm and 1.85mm.

separation between holes is 8mm.
the object is 10mm wide and 10mm high. the length depends on the number of holes.

individual diameter stls are added for diameters from 1.4 to 2.0 in 0.05 steps.