Mechanical Bore Gauge Range 2 in to 6 in Dial Graduation 0.0005 in Operation Type Mechanical Contact Style Anvil Dimension Type Inch Maximum Measurement - Inch 6 in Minimum Measurement - Inch 2 in Accuracy +/-0.00025 in Case Type Case Contact Point Material Carbide Includes Case Yes Series 3089 Repeatability 0.0005 in Resolution 0.001 in