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Amazon.com : 12 Pieces Trifold Poster Board, Lightweight Fold Presentation Board, Single Wall, Foldable Paperboard Display Board for School Project (Blue, 36 x 48 Inch) : Office Products
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BAZIC Trifold Presentation Board 36" X 48" White, Tri-Fold Corrugated Poster Boards, Cardboard for Display Boards Science Fair Art Project, 24-Pack - Newegg.com
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