Dynabrade 61465 Raptor Vac Air Powered Portable Vacuum System, 6.25 Gallon 
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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