The search results show two main material types: metal (typically steel mesh) and plastic. Several plastic models are described as polypropylene or BPA-free polypropylene.
Many items include built-in rails or ledges that support hanging file folders. Common features mentioned are top rails, rim ledges, or raised rims where the folder hooks can rest to keep documents organized.
Many boxes include handles or cut-out grips and are described as lightweight and easy to carry. Some lids have integrated compartments and secure latches to keep contents in place during transport.
Several options are stackable: some have grooves or indexed covers and matching lids/bodies that create secure stacking, while others are designed compactly for shelf or cabinet storage.
Most items explicitly support letter-size (8.5 × 11 in). A few descriptions also reference legal-size or models compatible with both letter and legal folders.
There are clear/translucent and mesh options that let you see contents, while other models include lids that keep files private and protected from sight and dust.
Several boxes include interior organizers such as in-lid compartments, dividers (including a 4-compartment divider), indexed covers, and top compartments for small supplies like pens, clips, or notes.