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Single Brick Suitable Letterbox Rear Access W3 4 XL
Black Through Wall Post Box W3 4 XL
Through Wall Letterbox W3 4 XL
W3-4_XL - Large through the wall post box for one brick walls
W3-4_XL - Through the wall letterbox for porches, dimensions
Through The Wall Letterbox W3 4 XL In Matt Black Rear View Rear Access
w3-4xl through the wall letterbox
Through The Wall Post Box In White W3 4 XL
Single Brick Suitable Letterbox Rear Access W3 4 XL
Black Through Wall Post Box W3 4 XL
Through Wall Letterbox W3 4 XL
W3-4_XL - Large through the wall post box for one brick walls
W3-4_XL - Through the wall letterbox for porches, dimensions
Through The Wall Letterbox W3 4 XL In Matt Black Rear View Rear Access
w3-4xl through the wall letterbox
Through The Wall Post Box In White W3 4 XL

Dimensions

  • Mail Chute Dimensions
    • Height: 108mm
    • Width: 373mm
    • Depth: 135mm
  • Mail Box Dimensions
    • Height: 400mm
    • Width: 373mm
    • Depth: 142mm
  • Letterplate Dimensions: 108mm x 373mm
  • Dimensions of Letter Slot: 30mm x 340mm
  • Trim Dimensions: 150mm x 415mm
  • Correspondence Suitable: A4
  • Capacity: 15.5L
  • Weight: 5.6kg

Features

  • Colours: Dark Grey RAL7016, Black
  • A4 Format Suitable
  • Material: Galvanised steel
  • Thermally powder coated for enhanced rust resistance
  • Secure cylinder lock (Euro-Locks-Lowe & Fletcher)
  • Keys: 2 supplied
  • Warranty: 2 year
  • Suitable for Single Brick Walls

Downloads

[su_service title=”A few tips:”]

  • Keys are attached inside the letter flap of your letterbox for dispatch, please keep them somewhere safe until your letterbox is installed and ready for use

[/su_service]

Delivery

Our current Dispatch and delivery terms can be viewed here

Description

The Through the Wall Rear Access Letterbox – W3-4 XL holds your post safely and securely, ideal if you have pets, and don’t want them being disturbed by post being delivered throughout the day. This letterbox can hold post up to A4 in size, and the forward opening access panel ensures mail can easily be retrieved.

This through the wall letterbox also includes a smart finish fitting trim designed to complete the letterbox look providing a flush to the wall letterbox.

The W3 range is thermally powder coated to protect against rust. It is available in 4 colours, black, white, copper and dark grey. The dark grey powder coating finish has a smooth matt appearance. The black, copper and white powder coating has a slightly textured gloss finish.

If you are looking for a through the wall letterbox that has a larger capacity, you may be interested in the Stamford. This is available in many mail chute depths and is custom made.

View our complete range of through the wall letterboxes here, 
or you can view more of our rear access post boxes here.

Through Wall Letterbox Locking Weatherproof for Single Brick Walls – W3-4 XL

SKU: DATHR405

Price range: £125.99 through £139.99

Personalise your product below with radio buttons LIVE - Sep 2025

Do you want to personalise your post box? * £9.99

Do you want to add a number? *

Choose font *

Height? *

Choose colour *

What number would you like (max 4 characters) *

Min: 1 charactersMax: 4 characters

Do you want to add text? *

Choose font *

Choose colour *

What text would you like (max 30 characters) *

Min: 1 charactersMax: 30 characters

0 / 30

Do we apply your chosen text to your letterbox? *

Read more

*

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Dimensions

  • Mail Chute Dimensions
    • Height: 108mm
    • Width: 373mm
    • Depth: 135mm
  • Mail Box Dimensions
    • Height: 400mm
    • Width: 373mm
    • Depth: 142mm
  • Letterplate Dimensions: 108mm x 373mm
  • Dimensions of Letter Slot: 30mm x 340mm
  • Trim Dimensions: 150mm x 415mm
  • Correspondence Suitable: A4
  • Capacity: 15.5L
  • Weight: 5.6kg

Features

  • Colours: Dark Grey RAL7016, Black
  • A4 Format Suitable
  • Material: Galvanised steel
  • Thermally powder coated for enhanced rust resistance
  • Secure cylinder lock (Euro-Locks-Lowe & Fletcher)
  • Keys: 2 supplied
  • Warranty: 2 year
  • Suitable for Single Brick Walls

Downloads

[su_service title=”A few tips:”]

  • Keys are attached inside the letter flap of your letterbox for dispatch, please keep them somewhere safe until your letterbox is installed and ready for use

[/su_service]

Delivery

Our current Dispatch and delivery terms can be viewed here

Description

The Through the Wall Rear Access Letterbox – W3-4 XL holds your post safely and securely, ideal if you have pets, and don’t want them being disturbed by post being delivered throughout the day. This letterbox can hold post up to A4 in size, and the forward opening access panel ensures mail can easily be retrieved.

This through the wall letterbox also includes a smart finish fitting trim designed to complete the letterbox look providing a flush to the wall letterbox.

The W3 range is thermally powder coated to protect against rust. It is available in 4 colours, black, white, copper and dark grey. The dark grey powder coating finish has a smooth matt appearance. The black, copper and white powder coating has a slightly textured gloss finish.

If you are looking for a through the wall letterbox that has a larger capacity, you may be interested in the Stamford. This is available in many mail chute depths and is custom made.

View our complete range of through the wall letterboxes here, 
or you can view more of our rear access post boxes here.

Frequently Asked Product Questions

How long until I receive my order?

We have 3 delivery options available at the checkout, 2-3 day, next day and next day priority to arrive before 12pm. Please note, orders need to be received before 12pm on a working day for us to dispatch the order on the same day. Orders received after 12pm on a Friday, over the weekend, or on a bank holiday, will not be dispatched until the following working day.

Is this item in stock?

Any item shown as “In stock” next to the “Add to basket” button, is available for immediate dispatch from our UK warehouse. Some of our communal letterbox options may require assembly, and we can have these available for dispatch within 2 weeks. Please find further details in the above ‘Description’.

letterbox4you_uk

502 917

🏆Providing Quality Letterbox & Parcel Box Solutions
⭐️Platinum Customer Service Award
👍Changing The World One Letter Flap At A Time
🔜Enquire Now 🔜

🧠 Good things come to those who research…

This customer spent time choosing the right post box — and they’re glad they did. The Partridge impressed with its high-quality finish, simple installation, and thoughtful extras (yes, it comes with 2 keys!).

💬 “I’m so glad I did some research and picked this one.”

📦 Built to last
🔑 Comes with 2 keys
🛠️ Easy to install
✔️ Satisfaction guaranteed

#Letterbox4you #PartridgePostBox #WallMountedLetterbox #CustomerReview

1 0
Open post by letterbox4you_uk with ID 18156639628380550
🧠 Good things come to those who research…This customer spent time choosing the right post box — and they’re glad they did. The Partridge impressed with its high-quality finish, simple installation, and thoughtful extras (yes, it comes with 2 keys!).💬 “I’m so glad I did some research and picked this one.”📦 Built to last🔑 Comes with 2 keys🛠️ Easy to install✔️ Satisfaction guaranteed#Letterbox4you #PartridgePostBox #WallMountedLetterbox #CustomerReview

...

1 0

✉️ Not all post boxes are created equal...

This customer learned the hard way with a cheap alternative that couldn’t even take A4 post. Thankfully, the SD5 delivered — literally.

✅ Takes A4 post with ease
🧠 Clear info online = smart decision
💌 Even the postie approves!

💬 “Our post lady loves it too!”
Now that’s a win.

#Letterbox4you #WallMountedPostBox #SD5PostBox #HappyCustomer

5 0
Open post by letterbox4you_uk with ID 18123920347485249
✉️ Not all post boxes are created equal...This customer learned the hard way with a cheap alternative that couldn’t even take A4 post. Thankfully, the SD5 delivered — literally.✅ Takes A4 post with ease🧠 Clear info online = smart decision💌 Even the postie approves!💬 “Our post lady loves it too!”Now that’s a win.#Letterbox4you #WallMountedPostBox #SD5PostBox #HappyCustomer

...

5 0