Holds eight 4"x5" Polaroid* prints or four 4"x5" sleeved negatives or transparenciesExclusive thin backing coupled with high clarity allows you to make quality contact sheets without removing or handling negatives. Strong continuous seams prevent negative hang up. Top sheet is 3 mil and bottom sheet is 1.8 mil. Archival quality polyethylene - NO PVC - safe for long term storage. PAT passed 100 pages per pack