ndsox 2 pack 36" x 48" white trifold poster board large corrugated tri fold business presentation boards picture posterboard for science fairs, school projects, event displays, art exhibitions white 36 x 48 inch 2 is up for auction in Office Products. The current bid is $1.00, 96% below the $27.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.