Protect your cherished photos and artwork with this acid-free, archival quality board Use this 20x24' bright white cotton museum board for professional-looking photo mounting The 4-ply thickness provides a sturdy, durable backing for framing your important images Each package contains 15 sheets, offering great value for multiple framing projects Ensure safe shipping of your valuable prints with the included Archival Methods SafeShip Box Create stunning gallery-worthy displays with this bright white, 100% cotton museum board