The Print File 120 3HB 25 holds fifteen frames of 6x4.5cm, twelve frames of 6x6cm, or nine frames of 6x7cm 120 film. Also, holds contact prints on 8"x10". It features exclusive thin backing coupled with high clarity, which allows you to make quality contact sheets without removing or handling negatives. The strong continuous seams prevent negative hang up. The top sheet is 3 mil and bottom sheet is 1.8 mil. These sleeves are made of archival quality polyethylene - NO PVC - safe for long term storage. PAT passed.