3M 18470, Scotch-Brite Roloc Coating Removal Disc, CR-DR, SiC Extra Coarse, TR, 4 in, 7100021755, 40 per case 
Insize ISO-8000FN, COATING THICKNESS GAGE(HIGH PERCISION), 0~19.6mils/0~59.0mils, 6974029771361
$1,597.75
Resolution .01mils
Can measure thickness of thin costing below .4mils
High repeatability
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