Foam Core Backing Board 3/16" White 24x48- 10 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
Acid-Free Foam Board (3/16in) for Mount and Backing of Photography
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18x24 Archival Foamcore Backing - 5 Pack
Foamcore Backing Boards for mats and frames
Foam Core for Picture Framing Backing Board White and Black(id:5898272) Product details - View Foam Core for Picture Framing Backing Board White and Black from Refine Industry Co.,Ltd-GMCQ - EC21 Mobile
Pack of 10 1/8 White Foam Core Backing Boards (20x24 White) | eBay
Amazon.com : Foam Core Backing Board 3/16" White 20x24-100 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects : Office Products