The NSB45-120 Flip-Top Negative Storage Box from Print File is a black linen box with a flip-top lid used to store 120 & 4 x 5" negatives and protect against dust and scratches. The box is also compatible with the 120 Flap & 4 x 5" Negative Envelopes. The box has metal-reinforced corners which can sustain additional weight when boxes are stacked on top of each other during storage. The acid- and lignin-free box has passed the Photographic Activity Test (PAT) which makes it suitable for long-term storage.