ALLmeter Digital Dial Indicator 0.01mm/0.0005'' Digital Probe Dial Test Indicators 0-25.4mm Electronic Indicator Gauge with Large LCD Display for Industrial Laboratory 3D Printer Switchable mm/inch: Amazon.com: Industrial & Scientific
Mitutoyo 1003AB Series 1 Compact Small Diameter Dial Indicator, 4 mm, 0.01 mm graduation