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Integrated digit counter reduces reading errors
Extension rod
50” on centers
reliable readings in both metric and inch models with exceptional repeatability
1000mm (3 pcs
Mitutoyo 139 Series Inside Micrometer Mitutoyo Integrated digit counter reduces readingMitutoyo 139 Series Inside Micrometer The Mitutoyo 139 Series Inside Micrometer is a precision mechanical measuring instrument designed for accurate internal diameter measurement of holes, grooves, and recesses. Featuring a smooth micrometer mechanism and hardened measuring faces, the 139 Series provides reliable, repeatable measurements across a wide range when used with extension rods. Its robust construction and straightforward operation make it a