48Pack Plastic Envelopes, Binder Pockets for 3/4/11 Ring Binder,Expandable Document Organizer with Snap Button and Label Plastic envelopes are made of polypropylene plastic and come in 6 different colors, 8 of each color. Plastic file folders are waterproof, tear-proof, and durable, and can well protect documents and office products from damage. LARGE CAPACITY: The binder pocket features an expandable design that allows the pocket sides to expand to 0.8 inches/2cm high, and the binder can easily hold at least 200 sheets of A4 paper, or even more. Multi-Punch Spine Design: Binder pocket with multi-punch holes for use with most standard 2/3/4/11 ring binders. Fits most lever arch and ring binder folders. The A4 plastic folder is also top-opening for quick and easy access to documents. PRACTICAL DESIGN: Clear plastic material allows viewing of contents without opening, each folder has a label pocket, multiple colors and labels to categorize and identify your documents. Snaps keep contents secure. MULTIPLE USES: The binder is lightweight and suitable for daily use, keeping documents organized and easy to carry to store documents, can be used at school, home, office, paperwork and business trips. size: about 32 x 23.5cm Material: plastic colour: As Shown Package Contents: 48 x binder folders Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.