SPI Absolute Electronic Bore Gage Set Specifications include the following... 1.4" - 6" Measuring Range 0.00005" / 0.001mm Resolution Electronic Indicator Set includes the following... 2 Interchangeable Measuring Heads 1.4" - 2" 2" - 6" Carbide Contact Point Anvils 1.4", 1.6", 1.8", 2.0", 2.2", 2.4", 2.6", 2.8" 3.0", 3.2", 3.4", 3.6", 3.8", 4.0" 2" Extender 3 Spacers / Washers 0.02", 0.05", 0.1" Includes Fitted Case GROUND FREIGHT ONLY