Amazon.com: Desk Tech Large Tri-Fold Presentation Board - 36 x 48 inches - Sturdy Corrugated Paper -White/Black -Perfect for School Projects, Exhibitions and Workshops : Patio, Lawn & Garden
BAZIC Tri-Fold Corrugated Presentation Board - White 36" X 48" - Bazicstore
Pacon Presentation Board, White, Extra Large, Single Wall, 48 In x 48 In, Pack of 3 at Lowes.com
Elmer's 36" X 48" Tri-fold Foam Presentation Board - Black : Target
Amazon.com: BAZIC Trifold Presentation Board 36" X 48" White, Tri-Fold Corrugated Poster Boards, Cardboard for Display Boards Science Fair Art Project, 24-Pack : Everything Else