Test the accuracy of your printer, overhangs, and print cooling at various object orientations with one test.  Each cylinder in this model is 56mm in length from the center origin to tip and 6 mm in diameter and labeled with the overhang angle: 0 degrees (flat on the bed), 20 degrees, 30 degrees, 45 degrees, 60 degrees, and 90 degrees.  A caliper can confirm that your prints match the design.  The model can be scaled down to 50% and rotated on the Z axis to check other orientations.  There is a cylindrical depression on the front-facing leg of the model to remind you of the model's print orientation. 

Print with your typical print settings and filament or:

2 walls

.2 mm layer height

no supports

15% infill (or less)