Foam Core Backing Board 3/16" Black 12x24- 5 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
Amazon.com: Foam Boards White Foam Core Backing Boards, Silver Craft Knife with Protective Cap and 12 Inch Stainless Steel Ruler for Art Presentations Crafts Display Favors(White, Silver, 12 x 10 x 0.2
What is Foam Board, What is it Used For? - Laird Plastics
What is Foam Board
Artcare FoamCore Board | TALAS
3/8" White Acid Free Buffered Foam Core Boards : 48 X 48 - BOXFORLESS.COM
Amazon.com : Pack of 25 11x17 3/16" White Foam Core Backings : Office Products