Archival Storage Sheets 35-7B25 for 35mm Film Negatives 7 Strips 25 Pack Holds seven 35mm strips of 4 frames, 28 frames total Exclusive thin backing coupled with high clarity allows you to make quality contact sheets without removing or handling negatives Contact prints on 8.5 x 11 in with 3 mil top sheet and 1.8 mil bottom sheet Strong continuous seams prevent negative hang up Archival quality polyethylene - NO PVC - safe for long term storage