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more info...
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List price: US $5.00
Price:
US $3.00
You save:
US $2.00 (40%)
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Displays Wentworth grain size classifications, sorting, centimeter and millimeter scales. Thick tanslucent plastic. Size: 4 x 2 inches.
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more info...
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Price:
US $14.30
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Compact 2-1/2 x 3-1/2" gauge is loaded with sand specifics including: size classification for large clasts; size classification from silt to very coarse, with actual sand grains; roundness chart with actual grains; bed thickness classification; field checklist to organize notes; geologic time scale; and two carbonate classification charts. Flexible and waterproof plastic card includes nylon lanyard, with sand grains fused to plastic. Shipping wt 8 oz.
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