Digital Outside Micrometer Range 20.660 in to 21.650 in 525 to 550 mm Resolution 0.0001 in/0.001 mm IP Rating IP67 SPC Output Yes Thimble Type Friction Anvil Material Carbide Includes Output Capability for Data Transmission Lock Nut Type Lever Maximum Measurement - Inch 21.650 in Maximum Measurement - mm 550 mm Minimum Measurement - Inch 20.660 in Minimum Measurement - mm 525 mm Spindle Material Carbide