Microscope Eyepiece Reticules (Graticules) 

NG21 Lennox Grain Sizing

Eyepiece Reticle for Lennox for Grain Analysis. Array of dashed Squares and Crosses.

Technical Specification

Glass Type and Thickness
Soda Lime 1.5mm thick

Diameter Tolerance
+0/-0.1mm

Orientation
Correct reading through glass