Inner diameter gauge with a measurement range from 50 mm to 160 mm (1.97 in to 6.23 in) and an accuracy of 0.01 mm (0.0003 in). Precision probes - The measuring head has an active probe at one end and a replaceable probe that is selected based on the measured opening to suit different bore sizes. Applications - Suitable for comparative measurement of the inner diameter of workpieces. - Useful for machining measurement tasks that require precise bore checks. Professional measurement - Features an excellent guide bridge for accurate, reliable self-centering. - Made of aluminium alloy for durability and long service life. Use scenarios - In a machine shop, during turning or milling, verify bore diameters within the 50–160 mm range with 0.01 mm precision to ensure parts meet specification. - In quality control, perform comparative inner-diameter checks against nominal values before assembly. - During fixture or tooling setup, adapt to different openings using the replaceable probe for repeated inner-diameter measurements.