The Mitutoyo 104-139A Outside Micrometer with Interchangeable Anvils has the following specifications:Range: 0-100mmGraduations: .01mmMass(kg): 0.79Remarks: With 4 Anvils & 3 StandardsWith Ratchet StopFeatures:● Wide measuring range with interchangeable anvils.● With a Ratchet Stop for constant force.● Supplied with zero-setting standards bar for each range.● Supplied in fitted wooden case.● Measuring faces: Carbide tippedTechnical Data● Accuracy: +/- (4 + R/75)um R = Max Range (Metric)● Graduation: 0.01mmFlatness:● .0006mm for models up to 300mm● .001mm for models over 300mmParallelism:● .002mm for models up to 75mm● .003mm for models up to 150mm● (2 + R/100)um R= Max range (inch)