These ART PRESENTATION BOOKS are archival quality. Excellent for carrying and presenting artwork, photos and prints. The covers are made from durable 60 pt. polypropylene with stitched nylon fabric edges. Each book has twenty-four 1.5 mil, polyester, double-sided pages (48 views), and a 100% acid-free, black, 4.5 mil polyester inserts. Books are water- and stain-resistant.