Reticle ASTM E-45 Method B Overlay Grid
KR-843 glass eyepiece grain counting reticle ASTM E-45 Method A, D and E. Square is 0.280" x 0.280" (7.11mm) inside dimension. Scale is 10mm in 100 divisions. Each division = 0.1mm. Reticle is available in a number of different diameters, select when ordering.
NOTE: This is a special order product. Please allow 2-3 weeks for delivery. This item is not returnable.
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