These 24"w x 36"h panels are perfect for posters, maps, art, blue prints, imprints, photos, any product that requires a flat display surface. The panels open to a 90º angle for easy viewing. Each matboard panel is covered with a clear plastic that protects items from damage. Two-sided panels are supported by welded 5/8" square tubing framework to hold a wide variety of materials. The finish is black or white. These are used by libraries, museums, churches, stores, malls, hotels, offices, etc. The bin is made for 1 1/2" tubes.