Ring binder Donau 4-ring A4 37 mm blue — Donau 2788164PL-10

The Donau 4-ring A4 binder with a 37 mm spine in blue is a practical filing solution for punched A4 documents. It secures papers with four metal rings and is designed to store reports, invoices, manuals and other paperwork in an organised manner while occupying minimal shelf space. The binder's format and ring capacity make it suitable for regular office, school and home filing needs.

Advantages

This binder features a 37 mm spine that accommodates a substantial stack of punched A4 sheets while keeping them accessible and flat. The four-ring mechanism ensures even alignment of pages and reduces page wear during flipping. The rigid cover provides protection from dust and light mechanical damage, and the blue exterior allows easy visual identification among other binders.

Suitable for

• Storing and organising A4 punched documents such as reports and invoices
• Office filing systems and project documentation
• School notebooks, coursework and handouts
• Home record keeping, manuals and reference materials

Key specifications

• Format: A4
• Ring type: 4 metal rings
• Spine width: 37 mm
• Cover: rigid protective cover
• Colour: blue

How to use

Open the ring mechanism and insert punched A4 sheets onto the metal rings, ensuring the punched holes align with the rings. Close the rings securely so pages lie flat and turn smoothly. Place the binder upright on a shelf or store it horizontally, using the spine for quick identification. For bulk filing, distribute inserts evenly to avoid overstressing the rings.

Usage recommendations

To preserve the binder and contents, avoid overfilling beyond the spine capacity, keep the cover clean and dry, and open the rings gently to prevent misalignment. Use reinforced punched sheets or plastic sleeves for frequently handled documents to extend their longevity.