• 25mm long scale.
• Each division 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
• All line widths = 0.005mm +/-0.0005mm

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