3M 29832, Sanding Screen, 150 Grit, 18 in x NH, 7100160831 
Insize 3287-3, GROOVE MICROMETER, 2-3″, 6928640327575
$611.38
Graduation .001″.
Measure width of grooves inside bores.
Non-rotating spindle.
Two graduations for inside and outside measurement.
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