With instrument uncertainty to 2 millionths of an inch (50 nanometers), the Labmaster Universal (LM U306270) is suitable for virtually all Internal (ID) and external (OD) measuring applications. This laser-based universal length measuring system (ULM) has been developed by Pratt & Whitney for gage calibration laboratories that need to precisely measure length, outside diameter, inside diameter, pitch diameter, lead, major/minor diameter, taper, linear displacement, and thickness.