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.