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Amazon.com : 25 Pack Foam Core Board 24 x 36 Inch Foam Core Backing Board Sheet 3/16 Inch Thickness Polystyrene Poster Board for Presentations Signboards Arts and Crafts Framing Display Projects (White) : Office Products
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Foam Core Backing Board 3/8" White 18x24- 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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