Acid Free 1/8 Foam Board | Shop for an Ultra-Thin 1/8 Inch Foam Board at Foamboards.com
Amazon.com: Jerry's Artarama Acid-Free Foam Board Sheets for Artists and Framers 20"×30" (1/8" Thick), Box of 40 - Ideal for Mounting and Cutting, White Foam Poster Board, Foam Core Board - White :