Masaccio Duralong Special Self-Assembly Box with Back Light Gray 1.4 mm 360x260x115 mm

“Masaccio” back-opening boxes are made of Duralong Special archival board and Duralong Basic economical board, ideal for long-term horizontal storage. The falling spine allows safe insertion and removal of documents and ensures a microenvironment inside the box that is protected against chemical-physical changes (dust, light, environmental pollutants). Extremely strong and rigid thanks to double-thickness walls on three sides of the base and one lid. Small self-locking flaps that fit into the double wall ensure easy assembly.