The Triangular Roll Storage Box offers safe, archival protection for rolled items in your collection. These corrugated E-flute boxes are offered in 30" and 36" lengths and sold in packages of 3. Boxes ship flat. Assembly is required.
https://www.archivalmethods.com/product/triangular-roll-storage-box
• acid-free, lignin-free, buffered
• six inch sides of the triangle will hold a diameter of up to 3-1/2''
• flat sides means it will not roll off your work surface and it stacks more easily than a tube
• opens fully on the long side allowing for safe, easy placement and removal of rolled items
• design avoids the kinds of damage caused by pulling on the edges of items when removing them from circular tube storage containers
