3M 14211, Roloc Disc Pad TS and TSM, Medium 2 in 1/4-20 Internal, 7000045283 
3M 45099, Roloc Disc Pad TR, Medium 1-1/2 in 1/4-20 Internal, 7000045280 
Insize 3229-6, TUBULAR INSIDE MICROMETER, 5-6″, 6928640328800
$130.84
Graduation .001″
Carbide measuring faces.
5 to 6″ Range
Accuracy: .00024″
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