3M 22397, Roloc Disc 361F, 60 YF-weight, TR, 1-1/2 in x NH, 7000045097 
Insize 3287-4, GROOVE MICROMETER, 3-4″, 6928640327582
$701.92
Graduation .001″.
Measure width of grooves inside bores.
Non-rotating spindle.
Two graduations for inside and outside measurement.
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