Alvin ARF20 blueprint storage box is durable, compact, and constructed of corrugated fiberboard. Includes slotted hand-hole. 15" wide x 12" deep, height is 11.5" in front and 22" in back. Shipping weight is 4 lbs. 20 holes for organizing blueprints, posters, rolled files (each hole measures approx. 3.5" wide). Shipped flat, easy to set up. Alvin cardboard roll file blueprint storage boxes are quality-made in the USA.