3M 28217, Cubitron II Roloc Disc 984F, 60+ YF-weight, TR, 3 in, Die R300V, 7010326790 
Insize 2424-E600, BORE GAGE FOR BLIND HOLES, 11.8-23.6″, 6928640357176
$9,603.48
To measure diameter of shallow and blind holes
Optional accessory: 0.01mm or 0.001mm graduation dia indicators, setting ring, long handle, bore gage setter
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