# Ring Binder Donau 4-ring A4 37 mm black — document organizer, durable spine

**URL:** https://aio.lv/en/product--donau-2788164pl-01--11933946
**Data updated:** 2026-03-10 11:23 (EET)
**Category:** Document Folders
**Manufacturer:** Donau
**Manufacturer code:** 2788164PL-01
**EAN:** 5901503691366
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 6.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--donau-2788164pl-01--11933946

## 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 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Donau 4-ring A4 binder with a 37 mm spine in black. Designed for A4 documents, it features four metal rings for secure fastening of punched sheets, a sturdy cover and spine for upright shelf storage and frequent handling. Suitable for office, school and home use to organize reports, manuals, invoices and project files.

## Long description

Donau 4-ring A4 binder with a 37 mm spine in black is a document organizer designed for storing punched A4 sheets in offices, schools and homes. The binder features four metal rings that keep papers securely in place, a rigid cover and a firm spine that supports upright shelf storage and frequent handling. Its 37 mm capacity suits medium-thickness reports, manuals and project files while preserving order and easy access to documents.
Advantages
The binder combines a sturdy cover and a reinforced spine to protect contents from bending and wear during regular use. Four metal rings ensure reliable fastening and even distribution of pages, reducing shifting and creasing. The neutral black finish offers a professional appearance for filing on shelves or in cabinets, while the A4 format integrates with standard punched paper and hole-punched accessories.
Suitable for
 Organizing reports, invoices and manuals in office environments
 Storing school notes, coursework and class materials
 Keeping home documents, warranties and project files accessible
 Compiling project documentation and meeting materials for transport
Key specifications
 Format: A4 (suitable for A4 punched sheets)
 Spine width: 37 mm (approximate sheet capacity for medium-thickness documents)
 Ring type: four metal rings for secure fastening
 Cover: rigid, durable material for protection and upright storage
 Colour: black for neutral, professional filing
How to use
Open the rings by pulling the ring tabs or pressing the release mechanism, insert punched A4 sheets onto the rings and close them until they click to secure the pages. Arrange documents in the preferred order, add dividers or plastic sleeves for separation and protection, and store the binder upright on a shelf or flat in a cabinet. For removal, open the rings and slide out the required pages; close rings after use to maintain alignment and prevent paper damage.
Usage recommendations
To maximize durability and ease of use, avoid overfilling beyond the 37 mm spine capacity, use standard A4 punched sheets, and periodically check ring alignment to prevent tearing. Use dividers for complex filing and plastic sleeves for important or frequently handled documents.

## FAQ

### How much does the Donau 4-ring A4 binder 37 mm cost, and is it available for purchase?

The price is 7.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 922 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/11933946/67366235_large.webp