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

£125.99£132.99 (inc VAT)

  • 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
  • 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
Tips & Instructions
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


Our current Dispatch and delivery terms can be viewed here


This through the wall letterbox 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.

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