These ring binders from Exacompta are designed to organise documents and punched pockets in A4 format. 2-ring binders in A4 format for A4 documents: This set includes ten ring binders for the storage of A4 documents in assorted colours. Excellent materials: The ring binder folders are made of strong cardboard material covered in polypropylene. They also have an O-ring binding mechanism with 25 mm in diameter rings. Convenient spine label: Thanks to the clever design with spine labels, the contents in the folders are really easy to identify.