3M 13171, Scotch-Brite Multi-Finishing Wheel, MU-WL, 2S Medium, 6 in x 1 in x 1 in, 7000136469 
Insize 3229-19, TUBULAR INSIDE MICROMETER, 18-19″, 6928640356896
$256.48
Graduation .001″
Carbide measuring faces.
18 to 19″ Range
Accuracy: .00043″
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