Dynabrade 92056 3" Dia. x 80 Grit A/O Vacuum Hook-Face DynaCut Disc, 50/Pack 
Insize 3229-18, TUBULAR INSIDE MICROMETER, 17-18″, 6928640356889
$246.08
Graduation .001″
Carbide measuring faces.
17 to 18″ Range
Accuracy: .00040″
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