Ring Binder Donau 4-ring A4 44 mm black — Donau 2788204PL-01

Donau 4-ring A4 binder with a 44 mm spine in black is designed to store and organize punched A4 documents. The binder features four metal rings that securely hold hole-punched sheets and a plain cover that provides space for labeling. With a 44 mm spine capacity, it accommodates large sets of documents for office filing, archiving, presentations and everyday document management.

Advantages

The binder offers stable document retention through four metal rings and a reinforced spine that preserves shape under frequent use. Its plain black cover provides a neutral, professional appearance and room for external labeling. The construction is durable for repeated opening and closing, while the internal capacity supports thick stacks of punched A4 paper for systematic storage.

Suitable for

• Office filing and record keeping
• Archiving project documentation and reports
• Preparing presentations and training materials
• Organizing invoices, contracts and manuals

Key specifications

• Format: A4 (suitable for punched A4 sheets)
• Ring type: 4 metal rings for secure fastening
• Spine width: 44 mm capacity for thick document sets
• Color: black with plain cover for labeling
• Cover style: rigid/folder-style cover for stable stacking

How to use

Open the binder rings using the ring mechanism, align punched documents with the rings and insert sheets one by one or in small stacks to prevent bending. Close the rings until they click to ensure sheets are held securely. Use the cover surface or an inserted label on the spine to identify contents and facilitate retrieval. For removal, open the rings fully and slide documents off the rings evenly to avoid tearing.

Usage recommendations

Store the binder upright on a shelf to maintain spine shape and avoid overloading beyond the 44 mm capacity. Select A4 sheets with the appropriate hole punch spacing to match the four-ring mechanism for best results.