3M 26135, PPS Series 2.0 Adapter, Type S40, Trapezoidal Thread, 7100135335 
Insize 3229-16, TUBULAR INSIDE MICROMETER, 15-16″, 6928640356865
$222.68
Graduation .001″
Carbide measuring faces.
15 to 16″ Range
Accuracy: .00040″
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