Lineco Archival Infinity Photo File Box with Metal Edges, 12 Acid-Free Envelopes, 4 X 6 inches, Tan (462-5060) A photo organizing system that meets museum standards Acid-free and lignin-free box with metal corners Holds up to 1000 3-1/2 by 5 or 4 by 6 inch photos Includes 12 acid-free envelopes Color: Tan