3M 88904, PSA Cloth Disc 348D, 50 X-weight, 12 in x NH, Die 1200B, 7000118897 
Insize 3294-4, NON ROTATING SPINDLE DISK MICROMETER, 3-4″, 6928640375514
$368.25
Graduation .0001″.
Measure root tangent length of gear.
Non-rotating spindle.
Ratchet stop.
Supplied with setting standards
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