Presentation boards are tri-fold corrugated display boards used for projects booths science fairs and all types of displays. All boards are either white or colored on the front side and Natural Kraft on the back. 48 x36 boards fold to 24 x36 and Half-Size boards fold to 24 x18 . Presentation board headers are a corrugated header with slots for use on regular and heavy duty presentation boards. Assorted includes Blue Green Yellow and Red. Recyclable.