3M 22393, Roloc Disc 361F, 36 YF-weight, TR, 3 in, Die R300V, 7000045093 
Insize 3229-4, TUBULAR INSIDE MICROMETER, 3-4″, 6928640328787
$104.84
Graduation .001″
Carbide measuring faces.
3 to 4″ Range
Accuracy: .00020″
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