"GRID MANUFACTURED AND SHIPPED IN UNEXPANDED SECTIONS THAT ARE EASILY EXPANDED FOR FIELD USE; EA GRID SECTION WEIGHS 110 LBS; UNEXPANDED DIMENSIONS ARE 11 FT X 5 IN. X 8 IN.;EXPANDED SIZE IS 8 FT X 20 FT X 8 IN.; NOMINAL PANEL THICKNESS IS 0.047 IN.;CELL AREA IS 41 SQ. IN.; POLYMER MATERIAL IS HIGH DENSITY POLYETHYLENE,BLACK; 2 PER CENT CARBON BLACK CONTENT"