ClamshellStyle Archival Storage Box Use for 13 x 19" Images
13-1/2 x 19-1/2 x 1-3/4" BLACK Archival Barrier Board with an acid-free white lining.
These 60 point thick Clamshell boxes are acid-free, lignin-free and have a pH of 8.0-9.0. They have a 3% calcium carbonate buffer and reinforced metal corners for excellent stacking strength. Boxes have thumb notch for easy-open. Ship assembled. Museum grade archival.