Polypropylene is a truly archival material. It is acid-free and will not support molds. It is unaffected by moisture, and virtually indestructible.
These boxes are supplied in white, the Audio Tape boxes in black.
Boxes are easily assembled with either a self-locking system or with polypropylene rivets and locking washers.
All boxes are shipped flat. A $10.00 packing fee may apply for orders under 5 boxes, depending on box size.