Microscope Eyepiece Reticules (Graticules) 

NE42 Concentric Circles 0.25mm-2.5mm

Eyepiece Reticle with 10 Concentric Circles ranging in size from 0.25mm to 2.5mm diameter in 0.25mm steps. 5th circle has dashed lines

Technical Specification

Line Thickness
0.008mm +/-0.002mm

Glass Type and Thickness
Soda Lime 1.5mm thick

Overall Tolerance
+/-0.005mm

Diameter Tolerance
+0/-0.1mm

Cross Line Length
5.25mm approx.

Orientation
Correct reading through glass