3M 26022, PPS Series 2.0 Adapter, Type S12, 10 mm Male, 1.0 mm Thread, 7100135943 
Insize 3229-20, TUBULAR INSIDE MICROMETER, 19-20″, 6928640356902
$269.47
Graduation .001″
Carbide measuring faces.
19 to 20″ Range
Accuracy: .00043″
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