Mechanical Bore Gauge Range 6.5 in to 10 in Dial Graduation 0.0001 in Operation Type Mechanical Contact Style Anvil Dimension Type Inch Includes Indicator Yes Maximum Measurement - Inch 10 in Minimum Measurement - Inch 6.5 in Number of Spacers 7 Requires Indicator Yes Accuracy +/-0.00008 in Contact Point Material Carbide Includes Case Yes Number of Anvils 6 Series 511 Repeatability 0.00002 in