3M 18485, Scotch-Brite Coating Removal Disc, 7 in x NH S XCS Bulk, 7000120884 
Insize ISO-8000FN, COATING THICKNESS GAGE(HIGH PERCISION), 0~19.6mils/0~59.0mils, 6974029771361
$1,571.17
Resolution .01mils
Can measure thickness of thin costing below .4mils
High repeatability
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$13.40
Measuring/ Inspection Instruments
Insize ISO-2000FN, COATING THICKNESS GAGE, main unit, 6928640324642
$1,340.77