Elmer's Heavy-Duty Tri-Fold Display Boards, 36 x 48 Inches, Black, 12-Count (730191) Heavy duty tri-fold presentation board, opens flat to 36" x 48" and folds easily for portability and storage Double-ply 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 Case of 12 black surface tri-fold display boards Ideal for business presentations and school projects Folds Easily for Portability, Storage Premium Tri-Fold Presentation Board Opens flat to 36" x 48" Black Tri-Fold 12-Pack