The Mitutoyo 511-807 dial bore gage with micrometer head has the following specifications: ● Range: 400-600mm● Graduations: No Indicator Included● Stem Diameter: 8mm● Micrometer Head Travel: 50mm● Sub Anvil: 50mm, 100mm Features: ● Does not include a Mitutoyo Dial Indicator● Inch models have a graduation option of .0005″ and .0001″● Optional extension rods are available to measure deeper bores and holes● Large, newly designed hollow grips are easier to hold and reduce heat transfer from the operator for better accuracy● Models with dial indicators are fully protected by a rugged cover● Interchangeable anvils are constructed of alloy steel with carbide-tipped measuring faces for added accuracy and durability● Includes various anvils and spacers depending on size of gage ordered● Supplied in a fitted plastic case Technical Data: ● Technology: Mechanical● Contact Point: Carbide ball● Units: Metric● With Dial Gage Protective Cover (21DZA000): No