Ring Binder Donau Master 2-ring A4 50 mm blue

The Donau Master 2-ring A4 binder in blue is a functional file storage solution designed for punched A4 documents. With a 50 mm spine, the binder provides space for a substantial number of sheets while maintaining a slim profile for shelf storage and transport. The durable cover protects contents from wear and light damage, and the two-ring mechanism ensures papers stay securely fastened and aligned.

Advantages

This binder combines a sturdy cover with a reliable two-ring fastening system that keeps documents flat and orderly. The 50 mm spine offers a balance between capacity and compactness, making it suitable for regular filing and archiving. The simple design and neutral blue colour support easy identification and integration into office or study environments.

Suitable for

• Storing and organizing punched A4 documents
• Office filing and record keeping
• School notebooks and course materials
• Home paperwork and manuals
• Short-term archiving and project files

Key specifications

• Format: A4, compatible with standard A4 punched sheets
• Ring type: 2 rings for secure paper fastening
• Spine width: 50 mm capacity
• Cover: durable protective cover in blue
• Orientation: vertical spine for shelf filing

How to use

Open the two-ring mechanism and insert punched A4 sheets onto the rings, then close the rings until they click or align fully to prevent pages from slipping. Arrange documents in logical order before insertion for easier retrieval. Place the binder upright on a shelf or lay flat for transport. For heavy contents, close the rings carefully to avoid bending sheets and periodically check ring alignment to maintain smooth operation.

Usage recommendations

For optimal longevity, avoid overfilling beyond the 50 mm capacity. Use divider tabs or labelled inserts to separate sections and improve document retrieval. Store the binder away from direct sunlight and excessive humidity to preserve the cover and paper quality.