Two Cool Tri-Fold Poster Board, 36 x 48, White/White, 6/Carton - Office Source 360
Science fair trifold poster board
Boost Your Photography: Easy Photography Upgrade: Tri-fold Board
Pacon Half-size Sheet Poster Board
Royal Brites Dual Sided Dry Erase Poster Board 22 x 28 White - Office Depot
Amazon.com : Trifold Poster Board 36" x 48" White Presentation Board Science Fair Display Boards - for School, Fun Projects and Business Presentations - by Emraw : Office Products