7" Tape Reel Archival E-Flute Blue-Gray Corrugated Storage Box.
7-1/2 x 7-1/2 x 7/8". Clamshell design.
Acid-free, Lignin-free, buffered.

7" Tape Reel Storage Box
Archival Blue-Gray E-flute Corrugated Cardboard
7-1/2 x 7-1/2 x 7/8".  Clamshell design.
Metal-reinforced corners for stacking strength.

These museum grade storage boxes are acid-free, lignin-free, buffered and have a pH of 8.0-9.0.