As of October 2009, Geo Products now offers their full line of products in a textured sheet.
The textured material provides additional friction of the cell walls with smaller diameter infill materials such as sand or angular crusher fines.
The surface density of the indentations are 22 to 31 per cm2 (140 to 200 per square inch), and the nominal sheet thickness prior to texturing (ASTM D 5199) is 1.25 mm (50 mils) ± 5%. You can find the full specifications on the Geo Products website here.
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