Diameter Gauge

The model is to determine roundings or other diameters, you can recognise it well with +- 1mm accuracy.

The case consists of two parts. A top and a bottom. It has a thread, depending on the tolerances that the printer creates you have to take different tolerances for the bottom, these are labelled T0.X. If it is too tight, use a higher tolerance. I have printed with a tolerance of 0.3mm and it fits well.

There are two versions of the plates, one labelled and one unlabelled. I chose the unlabelled one and then marked it.

I printed it with PLA with 0.15mm layer height and 60mm/s. But you can also print the plates with 0.2mm or even 0.3mm, I would print the case with 0.15mm because of the thread. 
It takes about 3 hours and requires 20g of material.