3M 82975, Roloc D/F Cool Running Disc Pad TR, 3 in 1/4-20 Internal, 7010309116 
Insize 2121-41, DIGITAL INTERNAL CALIPER GAGES, .8-1.6″/20-40mm, 6928640392795
$348.32
Resolution .0002″/0.005mm
Accuracy ?.0012″, Repeatability .0004″.
Reading in digit and analog.
Display can be rotated by 170?.
Button function: tolerance Go and No-Go display, data preset, Max./min. measurement, data holding, inch/metric conversion, absolute/incremental measurement.
CR2032 battery, automatic power off.
Data output.
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