The Mitutoyo7213Dial Depth Gage has the following specifications: Range: 0-210mm Stroke: 30mm Graduations: .01mm Accuracy: +/- .03mm Flatness: .005mm Extension Rods: 3 Pcs. (30, 60, 90mm) Base Dimensions: 63.5 x 16mm Contact Point: Carbide Measuring Force: 2.5N Features: Wide probing range is available with supplied extension rods Bottom surface of the base is hardened ground and lapped for highest degree of flatness. Designed with a back plunger type dial indicator for upward facing readings. (7231, 7237, 7238) Technical Data: Dial reading: 0.01mm or .001" Flatness of base face: 5?m or .0002"
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