Reference Card -- Millimeter Grid
Millimeter grid card. White background on one side, black on the other. Useful for examining; snow crystals, sand grains, soil characteristics, or small artifacts.

Card measures 2.75" x 2.75", the same as our other "Pocket Sized" tools. Printed on 0.020" thick plastic stock. Includes a lanyard hole.

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Reference Card -- Millimeter Grid 1.50
Set of all 6 Reference Cards 6.50
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