AmazonBasics Expanding Accordian Organizer File Folders - Letter Size, 25-Pack - AMZ300
 
25-pack of accordion style expanding files with enclosed sides
Expandable to 3-1/2 inches; holds up to 400 sheets
Reinforced top gussets for added strength
Straight cut tab provides large, visible labeling area
Made of 30% recycled content; 30% post-consumer material