- Sleeves for archiving 35 mm film slides ,- To protect your valuable slides from external influences ,- Made from archive-safe polypropylene, clear ,- For 20 slide mounts up to 3.2 mm thick, with and without glass - Foil Thickness: 140 μ/180 μ ,- Material: Polypropylene (PP) ,- Number of Sleeves: 12 ,- Number of Slides per Sleeve: 20 ,- Possibility of Filing: Ring Binders big ,- Sheet Length: 310 mm ,- Sheet Width: 250 mm ,- Slide Format: 5 x 5 cm ,- Slide Thickness: 3.2 mm 2 years legal warranty only