All Exposures archival double weight assorted photo pocket pages are made of photo safe materials which in turn make them the safest photo album refill pocket pages available to protect your most precious photos. In fact, all these archival refill pages pass the same safety test approved and utilized by the Library of Congress and National Archives. Theres no more strict test and no safer pages. Our photo album refill pocket pages are polypropylene. They dont contain any of the chemicals found in lowerquality refill pages that bleach precious pictures. Three ring refill pages fit any standard binder. Includes 1 8" x 10" photo page; 2 5" x 7" photo pages; 3 3 1/2" x 5" photo pages; and 4 4" x 6" photo pages. Double Weight High durability and protection suited for heavy use.