Microscope Eyepiece Reticules (Graticules) 

G42 ASTM E112 Plate 1 Grain Sizing Disc

Eyepiece Reticle with Grain Sizing pattern to ASTM E112. Circular pattern with segments to represent various grain sizes.

Technical Specification

Image Diameter
19mm

Glass Type and Thickness
Soda Lime 1.5mm thick

Diameter Tolerance
+0/-0.1mm

Orientation
Correct reading through glass