AMTAST Professional Surface Roughness Tester Metal Surface Roughness Gauge: Amazon.com: Industrial & Scientific
Qualisurf I - Portable Surface Roughness Tester - QualiStore USA
High Accuracy Kr210 Portable Surface Roughness Meter Tester High Price Performance Easy To Use Possession 14 Testing Parameters - Surface Roughness Testers - AliExpress
PHTR-100 Probe for Measurements on Concave & Convex Surfaces - 6111525 - Light Tool Supply