The Seawhite Archival Box is a beautifully made, 50mm-deep hinged box. Available in four sizes, to fit artworks and prints of A5, A4, A3 and A2 in size. 50mm deep. Its sturdy yet portable, and because it's acid-free is a safe place to archive all your artworks. Its finished in 6oz black canvas and made in the classic clam-shell design. The Seawhite Archival Box is an elegant and secure way to store drawings, prints, photographs or other documents. Krystal Seal Sleevesare a big hit in the USA and are a perfect accompaniment to the storage boxes.