The 100-series comparators are sets of roughness specimens in slightly heavier-duty presentation than the Microsurf comparators, and are more suited to workshop use. The 100-series comparators cover the same range of machining processes as the Microsurf series.
Rubert R-119 Face Turning Description : Rubert Face Turning Comparator Number of patches : 8 Range of Roughness Ra Micro Inch : 16-2000 micro" Range of roughness Ra in microns : 0.4-50.0 microns N-groups : 5-12