Ring Binder Donau Master lever-arch A4 75 mm gray

Donau Master lever-arch A4 ring binder with a 75 mm spine is designed for organised storage of punched A4 documents. The binder combines a robust cover in gray with a lever-arch mechanism that opens and closes smoothly to allow quick insertion and secure retention of sheets. Its 75 mm capacity accommodates substantial document sets for office, school or home use while maintaining an orderly filing system.

Advantages

The lever-arch mechanism offers reliable, easy operation, reducing the effort needed to add or remove pages. The 75 mm spine provides ample capacity for thick reports and project files without increasing footprint significantly. A durable gray cover resists everyday wear and helps maintain a professional, neutral appearance in storage and on shelving.

Suitable for

• Office filing of reports, invoices and contracts
• School and university course materials and assignments
• Home paperwork and personal records
• Project documentation and archival storage

Key specifications

• Format: A4-compatible for punched paper
• Spine width: 75 mm capacity for multiple sheets
• Binding type: lever-arch mechanism for secure closure
• Cover colour: gray with a durable finish
• Ring mounting: standard two-ring system compatible with punched documents

How to use

Open the lever-arch mechanism by lifting the lever to release the rings, insert punched sheets onto the rings and close the lever until it locks to secure the contents. For even distribution and smoother closure, align punched holes carefully before closing. Use the spine for labeling to identify the binder contents on shelves.

Usage recommendations

Store the binder upright on shelves to prevent warping and avoid overfilling beyond the 75 mm capacity to maintain the mechanism’s longevity. For important or frequently handled documents, place dividers or plastic sleeves inside to reduce wear on punched edges.