These acid-free art print and poster sleeves provide professional-quality display and storage protection for flat artwork, photographs, posters, architectural drawings, and maps. Constructed from heavy-duty 8 mil clear flexible vinyl with reinforced double-stitched binding on all sides, each sleeve includes a removable acid-free fluted polypropylene stiffener insert and can display artwork on both the front and back. Available in nine sizes from 16"×20" to 40"×50", sold in 12-packs.