Elmer's Corrugated Tri-Fold Display Boards, 36 x 48 Inches, 1-Ply, Black Inside/Kraft Outside, 6-Count (J730305) Premium tri-fold presentation board, opens flat to 36" x 48" and folds easily for portability and storage Corrugate material is 100 percent recyclable Ideal for science fairs, school projects and business presentations Smooth surface is perfect for paints, markers, glue, and other embellishments Pack of 6 tri-fold boards, black inside, Kraft outside