Lineco Archival photo corners, holds smaller photos away from the page. No adhesive touches the photos, for use with the smaller photos, 4 x 6 and 5 x 7 see the 1-1/4 and 3 inch photo corners also. .Lineco Archival materials for the professional framer hobbyist or for office use. materials for mounting, repairing, cleaning and preserving. Ideal for prints, photos, postcards, or any paper item. All products are acid free with a neutral pH.