Binder/Lever Arch File Donau Master A4 50 mm yellow

Donau Master A4 50 mm lever arch file in yellow is designed to organise and store A4 documents with a moderate filing capacity. The binder features a 50 mm spine that accommodates punched papers and inserts, a reinforced outer cover for improved durability, a metal lever arch mechanism for reliable sheet retention and a clear label holder on the spine for quick identification. The plain yellow finish makes it easy to sort by colour in offices, classrooms or home workspaces.

Advantages

The reinforced cover provides better protection against bending and wear compared with standard paper folders. The metal lever mechanism allows secure locking and smooth opening and closing for adding or removing documents. The spine label holder enables fast visual identification when stored on shelves. The 50 mm capacity balances compact storage with the ability to hold several dozen punched sheets, while the rigid construction supports upright shelf storage.

Suitable for

• Organising A4 documents in offices and administrative environments
• School coursework, class handouts and teacher records
• Home office filing of invoices, contracts and reference material
• Project folders where moderate capacity and colour coding are required

Key specifications

• Format: A4
• Spine width / capacity: 50 mm
• Cover: reinforced, rigid cover for upright storage
• Mechanism: metal lever arch for secure document retention
• Label: clear label holder on the spine for identification
• Colour: yellow

How to use

Open the lever arch mechanism by lifting the lever, align punched paper with the rings and place sheets onto the posts. Close the mechanism until it locks to secure the contents. Use the spine label holder to insert a descriptive label for fast retrieval. Store the binder upright on a shelf or flat in a drawer; avoid overfilling beyond the 50 mm capacity to prevent strain on the mechanism.

Usage recommendations

For reliable performance, distribute heavy content across several binders rather than exceeding the 50 mm capacity. Keep the mechanism free of debris and avoid forcing the lever to extend its service life. Use colour-coded files to speed up retrieval and maintain an organised filing system.