# Mounting rail B-Tech BT8390 Extension Kit Black 12mm width 8mm depth 180mm length

**URL:** https://aio.lv/en/product--b-tech-bt8390-extb--10907777
**Data updated:** 2025-12-30 12:56 (EET)
**Category:** Electronics Accessories
**Manufacturer:** B-TECH
**Manufacturer code:** BT8390-EXT/B
**EAN:** 5019318305917
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 35.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 29.33 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--b-tech-bt8390-extb--10907777

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

The B-Tech SYSTEM X Extension Kit for BT8390 is a black mounting rail designed for wall installation. It features a width of 12 mm, depth of 8 mm, and a length of 180 mm, providing a sturdy and reliable solution for mounting applications.

## Long description

The B-TECH SYSTEM X BT8390 Extension Kit (BT8390-EXT/B) contains six steel joining bars designed to extend mounting rails to a required length for wall-mounted applications. Finished in black, each joining bar fits into the side channels of the BT8390 mounting rail and is secured by internal grub screws; spring-loaded bearings on the underside allow accurate alignment and smooth engagement during assembly. The kit is suitable for creating larger continuous rails used in menu boards, video walls and other digital signage installations.
Advantages
The extension kit provides a straightforward method to lengthen BT8390 rails without altering the existing system, using six robust steel bars that clamp together with grub screws for a secure joint. Spring-loaded bearings ensure easy alignment and positive seating of the bars, while the black finish matches SYSTEM X components for a consistent appearance. The compact dimensions (12 mm width, 8 mm depth, 180 mm length per bar) make the kit compatible with standard BT8390 rails and installations.
Suitable for
Extending BT8390 mounting rails for large menu boards
Creating continuous rails for video walls
Joining rails in digital signage installations
Wall-mounted mounting rail expansions where a black finish is required
Key specifications
Manufacturer: B-TECH
Model / MPN: BT8390-EXT/B
EAN: 5019318305917
Material: steel joining bars
Finish: black
Individual bar dimensions: 12 mm width, 8 mm depth, 180 mm length
Quantity: 6 joining bars per kit
How to use
Insert each joining bar into the side channels of adjacent BT8390 mounting rails so the bars engage into the channel profiles. Align the bars until the spring-loaded bearings locate the correct position, then tighten the internal grub screws to clamp the bars together and secure the rail joint. Repeat for additional joints until the desired rail length and continuity are achieved.
Usage recommendations
Use the kit only with compatible BT8390 SYSTEM X rails and follow B-TECH installation guidance to ensure secure fixing. Check that grub screws are tightened to an appropriate torque and verify alignment before finalising the wall installation. For large or load-bearing signage, plan support points and consider professional installation.

## Specifications

| Feature | Value |
|---|---|
| Width | 12 mm |
| Depth | 8 mm |
| Product colour | Black |
| Length | 180 mm |
| Mounting type | Wall |
| Product type | Mounting rail |
| Harmonized System (HS) code | 83024200 |

## FAQ

### How much does the Mounting rail B-Tech BT8390 cost, and is it available for purchase?

The price is 35.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 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 29.06.2026 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: Cash payment, 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 B-TECH 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 B-TECH 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

### Where can I download the instructions for Mounting rail B-Tech BT8390?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/10907777/60786788_large.webp