1. Product Overview
The ARREGUI V4034 is a complete wall-through mailbox system designed for convenient mail reception in homes and buildings. It consists of an external letter panel and an internal mailbox, allowing mail to be deposited from the outside and retrieved securely from the inside. Constructed from galvanized steel, this system offers durability and resistance to corrosion.
This system is suitable for walls, doors, or fences and is designed to accommodate DIN A5 post, folded DIN A4 post, and standard envelopes.

Image 1: The ARREGUI V4034 Wall-Through Mailbox System, showing the external letter panel, the internal mailbox, and the letter slot cover. The mailbox features a lock for security.
2. Package Contents
Please verify that all components are present before beginning installation:
- 1 x ARREGUI V4034 Rear Mailbox
- 1 x ARREGUI V4034 Letter Panel (Letter Slot Flap)
- 2 x Keys for the mailbox lock
- Mounting material (screws, wall plugs)
3. Setup and Installation
The ARREGUI V4034 system is designed for straightforward installation on a door, wall, or gate. The necessary mounting material is included.
3.1. Required Tools (Not Included)
- Drill
- Drill bits appropriate for your mounting surface (wood, masonry, metal)
- Screwdriver
- Measuring tape and pencil
3.2. Installation Steps
- Select Location: Choose a suitable location on your door, wall, or fence where the mailbox system can be securely mounted and easily accessed. Ensure there is sufficient space on both the exterior and interior sides.
- Mark Drilling Points: Position the external letter panel and the internal mailbox against the chosen surface. The rear holes on both components are pre-drilled. Use a pencil to mark the drilling points for both the letter panel and the mailbox, ensuring they align correctly for the mail slot to pass through.
- Drill Holes: Using an appropriate drill bit, carefully drill holes at the marked points. For masonry or concrete, insert the provided wall plugs.
- Mount Letter Panel: Secure the external letter panel to the outside surface using the provided screws.
- Mount Mailbox: Align the internal mailbox with the corresponding opening and secure it to the inside surface using the provided screws. Ensure the mailbox is level and firmly attached.
- Test Operation: Verify that the letter slot opens and closes smoothly and that the mailbox door locks and unlocks correctly with the provided keys.
4. Operation
The ARREGUI V4034 mailbox system is designed for simple and secure mail handling.
- Mail Insertion: Mail is inserted from the outside through the letter slot located on the external letter panel. The design ensures that mail drops directly into the internal mailbox.
- Mail Retrieval: To retrieve mail, open the door of the internal mailbox using one of the provided keys. The mailbox is designed for rear access, meaning mail is collected from the inside of your property.
- Security: The internal mailbox is equipped with a lock to secure your mail. Always ensure the mailbox door is properly closed and locked after retrieving mail.
5. Maintenance
To ensure the longevity and optimal performance of your ARREGUI V4034 mailbox system, follow these simple maintenance guidelines:
- Cleaning: Periodically clean the exterior and interior surfaces with a soft, damp cloth. Avoid abrasive cleaners or harsh chemicals, as these can damage the galvanized steel finish.
- Lubrication: If the lock mechanism becomes stiff, apply a small amount of graphite lubricant to the keyhole. Do not use oil-based lubricants, as they can attract dirt.
- Inspection: Regularly inspect the mounting screws and the overall structure for any signs of loosening or damage. Tighten screws as needed. Check the letter slot flap for smooth operation.
- Corrosion: While galvanized steel is highly corrosion-resistant, prolonged exposure to harsh weather conditions can eventually affect the finish. Address any minor rust spots promptly with appropriate rust treatment products designed for galvanized metals.
6. Troubleshooting
If you encounter any issues with your ARREGUI V4034 mailbox system, consider the following:
- Difficulty Inserting Mail: Ensure the letter slot flap is not obstructed. Check if the internal mailbox is full.
- Stiff Lock: Apply graphite lubricant to the keyhole as described in the Maintenance section. Ensure the key is fully inserted and turned correctly.
- Loose Components: Check all mounting screws and tighten them if necessary. If components feel wobbly, re-evaluate the installation and ensure proper anchoring to the surface.
- Water Inside Mailbox: Verify that the letter panel and mailbox are correctly installed and sealed against the mounting surface to prevent water ingress. Check for any damage to the mailbox structure that could allow water entry.
7. Specifications
| Brand | ARREGUI |
| Model | V4034 |
| Material | Galvanised Steel |
| Color | Black |
| Mounting Type | Wall Mount |
| Included Security Features | Lockable |
| Letter Panel External Dimensions (W x H) | 24.8 cm x 7.3 cm (9.76 in x 2.87 in) |
| Letter Panel Slot Opening (W x H) | 23 cm x 3 cm (9.06 in x 1.18 in) |
| Mailbox External Dimensions (H x W x D) | 30 cm x 26.5 cm x 14.5 cm (11.81 in x 10.43 in x 5.71 in) |
| Mailbox Slot Opening (W x H) | 23 cm x 4 cm (9.06 in x 1.57 in) |
| Capacity | DIN A5 post |
| Item Weight | 1.97 kg (4.33 lbs) |
| Included Components | Mailbox, letter panel, mounting material, 2 keys |





