These plastic document folder are made of durable polypropylene, non-toxic, waterproof, tear-resistant. Thicker material is stronger than other document bags on the market. ✔11 holes for binder: All of these A4 document folders fit any 2/3/4 ring binders and folders. ✔Single layer thickening: The thickness of each layer is 0.16 mm, the service life is longer, it is tear-resistant and can be reused. ✔Transparent plastic material: Make the files contained in it visible without opening, easy to check and save time. ☺Specifications Max dimensions: 30.2 x 23.3 cm. Expandable colour: transparent. Quantity: 100 pieces brochure sleeves Closure: plug-in Material (s): polypropylene supported. Binder type: 2/3/4 ring binder. Single page thickness: 0.16 mm. ☺Widely Used. Plastic folders are very useful for carrying a lot of paperwork and documents. Plastic folders can organise paperwork, banking business documents, insurance file, graduation work and other papers in separate folders. A great A4 plastic document holder helps you organize papers, memos, photos, letters and forms at home, office, school or on the go.