3M 20911, PSA Cloth Disc 348D, 50 X-weight, 2 in x NH, Die 200P, 7000118871 
Insize 3229-20, TUBULAR INSIDE MICROMETER, 19-20″, 6928640356902
$275.78
Graduation .001″
Carbide measuring faces.
19 to 20″ Range
Accuracy: .00043″
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