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Amazon.com: Expanded PVC Foam Board, White, 1/4" (0.25", 6MM) Thick, 18" W x 48" L : Industrial & Scientific
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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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