Mechanical Bore Gauge Set without Mechanical Indicator Range 0.7 in to 5.9 in Operation Type Mechanical Contact Style Anvil Dimension Type Inch Maximum Measurement - Inch 5.9 in Minimum Measurement - Inch 0.7 in Number of Gauges 2 Requires Indicator Yes Accuracy 157 micronin Contact Point Material Carbide Series 2423 Compatible Dial Graduations 0.00005 in 0.0001 in 0.001 in Repeatability 79micron in