Microscope Eyepiece Reticules (Graticules) 

NE57 Miller Squares Ratio 9:1

Eyepiece Reticle with Miller Squares pattern, 7x7 mm large square. The ratio of large to small square is 9:1

Technical Specification

Line Thickness
0.015mm +/-0.003mm

Glass Type and Thickness
Soda Lime 1.5mm thick

Diameter Tolerance
+0/-0.1mm

Overall Tolerance
+/-0.010mm

Orientation
Correct reading through glass