3M 45179, Roloc Disc Pad TR, Medium 4 in 1/4-20 Internal, 7000045281 
Insize 3229-5, TUBULAR INSIDE MICROMETER, 4-5″, 6928640328794
$116.97
Graduation .001″
Carbide measuring faces.
4 to 5″ Range
Accuracy: .00024″
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