These letter-size hanging file folders are constructed from durable poly plastic material designed for long-term use without tearing or weakening. Each unit features a one-inch expandable bottom that accommodates up to 250 sheets of standard letter-size paper, making them suitable for high-volume storage needs. The reinforced black gasket insert at the base provides structural support to prevent sagging or bulging when fully loaded. Tabs on the front allow for clear labeling and rapid visual identification of contents, streamlining document retrieval in office cabinets or shared workspaces. The set includes 12 folders in 6 distinct colors, with each color appearing twice to support basic categorization schemes. They fit standard letter-size filing cabinets and are ideal for organizing medical records, administrative paperwork, student files, or project documentation. No adhesives or tools are required for setup, and the smooth plastic surface resists dust accumulation and wipes clean easily. Their lightweight yet rigid construction balances portability with stability during handling and transport. Material: Metal.