Mechanical Bore Gauge without Mechanical Indicator Range 15.7 in to 31.5 in Dial Graduation 0.00005 in 0.0001 in 0.001 in Operation Type Mechanical Contact Style Anvil Dimension Type Inch Includes Indicator No Maximum Measurement - Inch 31.5 in Minimum Measurement - Inch 15.7 in Requires Indicator Yes Accuracy 118 micronin Contact Point Material Carbide Includes Case Yes Series 2422 Compatible Dial Graduations 0.00005 in 0.0001 in 0.001 in Repeatability 59micron in