The Ansook hanging file folder is designed for letter-size documents and constructed from durable poly plastic to withstand daily use without tearing or warping. Its accordion-style expanding sides and bottom provide one inch of additional capacity, allowing each folder to hold up to 250 sheets securely. Closed side panels prevent papers from slipping out while maintaining easy access to contents. Tabs support customizable labeling for quick visual identification in standard filing cabinets. The structure fits standard letter-size hanging file systems and works well for medical records, administrative archives, or general office organization. No adhesives or fasteners are required for setup, and the smooth interior surface allows documents to slide in and out without snagging. It functions reliably in both vertical and lateral filing cabinets and maintains shape even when fully loaded. This folder prioritizes function over aesthetics, with consistent dimensions and reinforced stress points at the hanger attachments. Color: Black. Material: Metal.