# Ring binder Donau Master 2-ring A4 50 mm black

**URL:** https://aio.lv/en/product--donau-3947001pl-01--11934024
**Data updated:** 2026-03-10 11:23 (EET)
**Category:** Document Folders
**Manufacturer:** Donau
**Manufacturer code:** 3947001PL-01
**EAN:** 5901498012894
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--donau-3947001pl-01--11934024

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Donau Master 2-ring A4 ring binder with 50 mm spine in black. Designed to hold punched A4 documents with a two-ring mechanism for organized storage and easy page turning. Suitable for office, school and home use to store reports, manuals and project files. Durable construction for regular handling and filing.

## Long description

Donau Master 2-ring A4 ring binder with a 50 mm spine in black is designed to store punched A4 documents securely and provide easy access for frequent handling. The binder features a two-ring mechanism that supports organized filing of reports, manuals and project files while keeping pages aligned for straightforward page turning. Its durable construction is intended for regular office, school and home use, combining a slim profile with a medium-capacity spine suitable for everyday document management.
Advantages
The two-ring mechanism ensures stable retention of punched sheets and smooth turning without snagging. The 50 mm spine offers capacity for a substantial stack of A4 papers while maintaining a compact footprint on shelves. The black cover provides a neutral, professional appearance that fits office and educational environments. Durable materials and a reinforced spine reduce deformation over time, supporting repeated opening and closing.
Suitable for
 Organizing reports, presentations and meeting documents
 Storing manuals, handbooks and technical documentation
 Keeping school notes, assignments and coursework together
 Archiving project files and client records for medium-term storage
Key specifications
 Format compatibility: A4 punched documents
 Ring type: two-ring mechanism for side binding
 Spine width: 50 mm (medium capacity)
 Colour: black
 Construction: reinforced spine and durable cover material for regular handling
 Intended use: office, school and home filing
How to use
Open the binder rings using the manual release on the mechanism, align punched documents with the rings and insert pages one by one to ensure proper placement. Close the rings until they click to secure the stack. For removal, press the release and withdraw pages gently to avoid bending the rings or tearing the punched holes. Store the binder upright on a shelf or flat in a drawer to maintain spine shape and keep contents accessible.
Usage recommendations
For prolonged durability, avoid overfilling beyond the 50 mm capacity and distribute heavy contents across multiple binders. Use A4 punched paper with standard hole spacing for optimal fit, and periodically check the ring alignment to prevent snagging when turning pages.

## FAQ

### How much does the Donau Master 2-ring A4 50 mm binder cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 19 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 14.07.2026 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/11934024/67366312_large.webp