This caliper holder is designed to fit Pittsburgh (Harbor Freight) brand calipers. Fitment is intentionally tight, some force is needed to install.
Designed to print without supports. You may need to add a brim if you have adhesion issues. I was able to print without a brim on my Creality K1. Print orientation as shown in the photos. Standard PLA with standard profile.
The author marked this model as their own original creation.