Reticle 27mm Straight Line Rules 0-15mm and 0-.60 Inch This English Micrometer Scale Reticle is used for critical measurements of object features. The English scale measures from 0 to 0.6” with 0.01” increments and numerical markings every 0.1”. The Metric Scale measures from 0 to 15mm in 0.1mm increments with numerical markings every 1mm. The pattern line width is 0.001” ±0.0001” (0.0254mm ±0.0025mm).The Pattern is right reading looking through the glass so that the pattern can be in direct contact with the object to be measured. The Reticle Pattern is very durable, double layer, deposited evaporative Chrome/Chrome Oxide, for a reflectivity of less than 5% looking at the pattern.The Patterns on all Reticles manufactured by Max Levy are replicated from Precision Chrome on Glass Tooling under clean room conditions. Click here to download drawing 27mm Compatibility Chart Full Compatibility Chart