Dynabrade 92086 3" Dia. x 36 Grit Ceramic Non-Vacuum DynaCut Locking-Type Disc, 25/pack 
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956 
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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