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CRL CRL1601 1/4" Foam Core Butyl Tape
3/16" Black Buffered Foam Core Boards :18 X 24 - BOXFORLESS.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