Ring binder Donau 4-ring A4 30 mm green

Donau 4-ring A4 ring binder with a 30 mm spine in green is designed to store and organise A4 documents using a four-ring mechanism. The binder provides compact file storage for office, home or school environments and accommodates punched papers, loose-leaf inserts and dividers. Its spine width allows for a moderate capacity of documents while maintaining a slim profile on a shelf.

Advantages

The binder features a durable cover and a reliable four-ring mechanism that keeps papers securely in place and reduces the risk of page displacement. Its 30 mm spine balances storage capacity and space efficiency, while the green colour aids visual identification in filing systems. The design supports easy insertion and removal of punched sheets and standard accessories such as dividers and plastic sleeves.

Suitable for

• Organising A4 reports, manuals and project documents
• School notebooks and student handouts
• Home paperwork such as bills, guarantees and instruction manuals
• Office filing and departmental document collections

Key specifications

• Format: A4-compatible document storage
• Ring mechanism: four-ring metal mechanism for punched sheets
• Spine width: 30 mm providing moderate document capacity
• Colour: green for visual organisation
• Cover material: rigid cover for protection and upright storage

How to use

Open the binder by unlocking the ring mechanism and align punched papers with the rings. Insert pages by threading the punches over the rings and close the mechanism until it locks to secure the contents. Use dividers or plastic sleeves to separate sections and protect individual documents. Place the binder upright on shelves or flat in drawers as required.

Usage recommendations

To maintain durability and neat appearance, avoid overfilling beyond the 30 mm spine capacity and store away from direct heat or prolonged sunlight. Regularly check the ring alignment and gently press closed if slight gaps appear to prevent page catching.