Ring binder Donau 4-ring A4 30 mm red — Donau 3934001PL-04

The Donau 4-ring A4 binder with a 30 mm spine in red is designed to organize and store punched A4 documents. The binder accommodates standard A4 sheets and features a metal 4-ring mechanism that keeps pages aligned and secure. Its 30 mm spine provides capacity for approximately 200–250 sheets depending on paper weight, making it suitable for everyday filing in office, school, or home environments.

Advantages

The rigid cover and durable metal ring mechanism ensure stable long-term storage and repeated opening without loss of function. The red finish provides clear visual identification on shelves or desks while the A4 format and slim profile fit standard filing systems and bookcases. The binder’s mechanism enables quick addition or removal of punched documents and keeps paperwork flat for easy reading and copying.

Suitable for

• Organizing reports, manuals and reference documents
• School assignments, handouts and project materials
• Home administration: bills, warranties and records
• Archiving and shelf storage of frequently accessed files

Key specifications

• Format: A4
• Ring system: 4 metal rings
• Spine width: 30 mm (approximate capacity 200–250 sheets)
• Cover colour: red
• Cover type: rigid/sleeved cover designed for durability

How to use

Open the metal rings using the lever or tab on the mechanism, insert punched papers aligned with the ring spacing, then close the rings until they click to secure the pages. Place dividers or transparent pockets if needed to separate sections. Store the binder upright on a shelf or flat on a desk; avoid overfilling beyond the recommended capacity to maintain ring alignment and prevent deformation.

Usage recommendations

For prolonged life, keep the binder dry and avoid exposure to direct sunlight for extended periods. Use properly punched A4 paper to prevent tearing at the holes and distribute documents evenly to keep the rings aligned. For frequent access, combine with tabbed dividers to speed up retrieval.