# Ring binder Donau Master A4 50 mm blue

**URL:** https://aio.lv/en/product--donau-3950001pl-18--1071458
**Data updated:** 2026-03-07 10:58 (EET)
**Category:** Document Folders
**Manufacturer:** Donau
**Manufacturer code:** 3950001PL-18
**EAN:** 5901498011828
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--donau-3950001pl-18--1071458

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Donau Master A4 ring binder, 50 mm spine capacity, blue. Durable organizer for A4 documents with metal ring mechanism suitable for storing and sorting papers, reports, invoices and project files. Designed for office, school or home use; provides easy access to documents and keeps sheets securely fastened.

## Long description

Donau Master A4 50 mm blue is a ring binder designed to store and organise A4 documents with a 50 mm spine capacity. The binder features a metal ring mechanism that securely fastens punched sheets and allows smooth opening and closing for easy access. Its rigid cover provides protection for papers, reports and invoices, while the practical spine width accommodates a substantial volume of documents for office, school or home use.
Advantages
The binder offers a sturdy build and a reliable metal ring mechanism that reduces the risk of sheet loss and ensures even alignment of pages. Its 50 mm spine is suitable for moderate to large collections of documents without significant bulging. The blue cover gives a clear visual identification for filing systems and the rigid construction protects contents from bending and damage during storage and transport.
Suitable for
 Organising reports, meeting notes and invoices
 Storing project documentation and handbooks
 Archiving school assignments and course materials
 Keeping manuals and reference sheets in offices or workshops
Key specifications
 Format: A4 compatible
 Spine capacity: 50 mm
 Closure: metal ring mechanism (ring binder)
 Cover type: rigid protective cover
 Colour: blue
 Intended use: document storage and organisation
How to use
Open the metal rings using the ring release on the mechanism, insert punched sheets or punched plastic sleeves, then close the rings firmly to secure the contents. Arrange documents in the desired order before inserting to minimise re-opening. Use dividers or labelled separators to divide sections and improve retrieval. When transporting, keep the binder upright or flat to reduce stress on the rings and pages.
Usage recommendations
For extended archiving, use acid-free punched sleeves or archival paper to protect important documents. Avoid overfilling beyond the 50 mm spine capacity to preserve ring alignment and cover shape.

## FAQ

### How much does the Donau Master A4 50 mm ring binder cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4826 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Donau products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Donau service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/1071458/68515916_large.webp