Reticle 26mm Circle/Thickness/Angle/Protractor, Inch Gauge This Multifunction reticle contains an English linear scale, Hole Diameter Gages, Thickness Gages, and a Radius Scale. The pattern line width is 0.001” ±0.0001”. Overall accuracy is ±0.00004”. The pattern is on the contact surface, right-reading looking through so that the object can be measured directly.Pattern: Angle scale: Reads 180° protractor, (0 to 90° mirrored) divisions every 2.5°, numbered every 10°. Inch Scales: Reads 0 to 0.50” in 0.0025” increments, numbered every 0.10”. Diameters: 10 circles, 0.005” to 0.50” diameter. Thickness Gauge: Nine sizes, 0.002” to 0.006”, 0.008”, 0.010”, 0.015”, 0.020”.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 the drawing. 26mm Compatibility Chart Full Compatibility Chart