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Foam Core Backing Board 3/8" White 24x36- 25 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
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Amazon.com : Frienda 12 Pcs Large Foam Core Board Bulk White Foam Board, 5mm Thickness Poster Board Sign, Polystyrene Foam Sheet for Signs, Craft Project, DIY, School Office Presentations(White, 36 x 48
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