High-Quality Material: This 12-pack of A4 plastic pockets is made from durable polypropylene plastic, featuring 6 different colors (2 of each). They're waterproof, tear-resistant, odorless, sturdy, and long-lasting, effectively protecting your files and office supplies from damage. Expandable Poly Pockets for Large Capacity: The expandable design allows the sides of the pockets to expand up to 0.8'/2cm, easily accommodating at least 200 sheets of A4 paper at a time, and likely more. Multi-Hole Punch Design: Fits most binders and ring binders. The multi-hole design allows it to be used with most standard 2/3/4/11 ring binders and folders. A4 plastic pockets are also top-loading for quick and easy access to documents. Practical Design with Transparent Plastic Material: See the contents without opening. Each label pocket includes a label pocket, and multiple colors and blank writable tabs to classify and identify your documents. A button closure keeps contents secure. Versatile Use: A4 plastic pockets are suitable for daily use, keeping documents organized. They're portable for document storage and lightweight, making them ideal for school, home, paperwork, office, and business trips.