Stage micrometer with two scales on it - 1" and 25mm.
1" ruler is numbered .0 through 1.0 every .100" division
0.0" through 1.0" divided into 0.1" increments
0.9" through 1.0" divided into 0.01" increments
The last two 0.01" increments are divided into 0.001" increments
25mm rulers is equally spaced and numbered 0 through 25
Each division between numbers 0 through 25 = 1.0mm
Each division between numbers 20 through 23 = 0.1mm
Each division between numbers 23 through 25 = .02mm
Lines: Chrome disposition
Flatness: 2 waves or better
Glass: 1" x 3" x 0.110" thick
Surface Quality: 20/10
Parallelism: 2 min.
Tolerances: +/-0.005mm
Calibration (NIST certified) is available and includes a total of 196 points certified.