This strip can be used to test different thicknesses. The sizes are 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0mm. For some reason, the 0.4mm didn't even create in ReplicatorG or print out.Print with 100% infill and 4 shells. I'm new to this, but I think the actual thickness is affected by the filament diameter. If you underestimate the filament thickness, then the walls will be thicker.As you can see from the picture, some of the walls break off. I may want to add a stiffening rib to each.