Out of Round (3 Lobe) Example Anida Technologies

File: Lobe Set.STL
Name: Lobe Set
Material: 29.69 grams (0.065 lbs)
Size: 109.19mm (4.3") x 64 mm (2.52") x 31.75mm (1.25")
Resolution: 0.20mm
Layers: 260 layers
Print Time: 3 hr 2 min
Function:  Set of three parts - a "caliper" tool with two parallel sides and a hole - a "perfectly round" part that slides between the parallel sides and into the hole - a three lobed "kind of round" part that  slides between the parallel sides but will not go into the hole.  This shows the classic GD&T issue with measuring roundness with two edges that is terribly flawed.