# Dog/Cat Door Accessory Trixie 3870 — Tunnel Element, White Plastic

**URL:** https://aio.lv/en/product--trixie-tx-3870--12056688
**Data updated:** 2026-03-12 19:40 (EET)
**Category:** Pet Accessories
**Manufacturer:** Trixie
**Manufacturer code:** TX-3870
**EAN:** 4011905038704
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.49 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 6.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--trixie-tx-3870--12056688

## 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

Trixie 3870 is a tunnel element accessory for dog and cat doors, made of white plastic. Designed as a connecting or extension part, it provides a rigid passage that integrates with compatible pet doors. Suitable for indoor or doorframe installation where an added tunnel section is needed to adjust thickness or create a stable opening for pet access.

## Long description

Trixie 3870 is a tunnel element in white plastic designed as an accessory for compatible dog and cat doors. It functions as a connecting or extension part that increases the depth of a pet door installation by up to 25 mm per element, enabling a rigid, stable passage through doors, panels or frames. The component is intended for use with matching model series and fits where an added tunnel section is required to adapt to thicker doors or to create a defined opening for pet access.
Advantages
The accessory is made of durable white plastic that resists moisture and daily wear typical in household environments. Its modular design allows multiple elements to be combined to reach the required depth while maintaining a straight, stable tunnel for pets. The product is lightweight, easy to handle and can be integrated discreetly with compatible door systems to preserve the surrounding finish.
Suitable for
 Extending the thickness of interior or exterior doors to accommodate a pet door
 Creating a rigid tunnel section in doorframes, panels or walls
 Adjusting installation depth when a single pet door element is not enough
 Situations where a clean white finish is preferred to match door trim or interior décor
Key specifications
 Material: white plastic
 Depth extension: up to 25 mm per element
 Designed for use as a tunnel/connecting element with compatible pet doors
 Intended for indoor and doorframe installations
How to use
Measure the total door or panel thickness and determine how many tunnel elements are required to achieve a flush and secure installation. Fit the tunnel element between compatible pet door components according to the pet door manufacturer's assembly instructions, ensuring alignment and a continuous passage. Secure all parts with the recommended fasteners and check that the tunnel is stable and free from sharp edges before allowing pets to use the opening.
Usage recommendations
Use only with compatible Trixie pet door models or models specified by the manufacturer. Combine multiple elements when necessary to reach the needed depth, and inspect the assembled tunnel periodically for loose fittings or damage. Clean the plastic surface with a mild detergent and a soft cloth; avoid abrasive cleaners that could scratch the finish.

## Specifications

| Feature | Value |
|---|---|
| Compatibility | 3869 |
| Material | Plastic |
| Product colour | White |
| Brand compatibility | TRIXIE |
| Product type | Tunnel element |

## FAQ

### How much does the Trixie 3870 tunnel element for dog/cat door cost, and is it available for purchase?

The price is 7.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 Trixie 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 Trixie 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/12056688/67592817_large.webp