Smead Pressboard File Folder, 1/3-Cut Tab, 1" Expansion, Letter Size, Dark Blue, 25 per Box (21541) Ideal for bulky, heavily used files Vivid colors help you code files for quick, easy identification Made from heavy duty pressboard for durability Tyvek-accordion pleat expands 1" to hold up to 125 sheets Contains 50% recycled content, 30% post-consumer material