Reticle Lineal Intercept for Grain Size ASTM E112

KR-854 glass eyepiece lineal intercept reticle for grain size counting to ASTM E112 methods. Four straight lines total 500mm. Space between lines is 1.3mm. Lines are 12.5mm long at 1x. Reticle is available in a number of different diameters, select below when ordering.

Lines: Chrome deposition
Chamfer: 0.010" - 0.020"
Flatness: 2 waves or better
Centering: Within 0.005"
Glass Thickness: 1.5mm+/-0.1mm
Surface Quality: 20/10
Parallelism: 2 min.

NOTE: This is a special order product. Please allow 2-3 weeks for delivery. This item is not returnable.