3M 07144, Inhalation Valve 6893/07144(AAD), System Component, 7000002049, 200 EA/Case 
Insize 3287-3, GROOVE MICROMETER, 2-3″, 6928640327575
$611.38
Graduation .001″.
Measure width of grooves inside bores.
Non-rotating spindle.
Two graduations for inside and outside measurement.
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