- Sleeves for archiving small-format negatives ,- To protect your valuable negatives from external influences ,- For 7 film strips of 6 24 x 36 mm negatives ,- For 35 mm film (135) - Foil Thickness: 35g/qm ,- Material: Glassine Matt (PER) ,- Number of Negatives per Sleeve: 42 ,- Number of Sleeves: 25 ,- Possibility of Filing: Ring Binders big ,- Sheet Length: 310 mm ,- Sheet Width: 260 mm 2 years legal warranty only