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Letterbox Vandalism and Arson Protection - Letterblox

5 in stock Expected dispatch: Tomorrow
£107.99 inc VAT
£89.99 ex VAT
Product Overview

Letterblox is an effective letterbox security device suitable for most letterbox apertures. It is used to prevent vandalism and arson attacks on your property while unoccupied, eg while you are on holidays or in between tenants. Constructed from solid steel plates which are secured in place to either side of the letterbox aperture via internally accessible knobs, the innovative Letterblox device will help to ensure your property remains safe. In many cases, insurers will require the letterbox to remain sealed while the property is unoccupied, otherwise it can lead to a invalidated insurance claim.

  • Protects property from vandalism and arson attack while unoccupied
  • Designed to fit the majority of door types and letter plate openings
  • No tools or fixings required for installation
  • 2 year manufacturer's warranty
  • Tested to BS EN 13724
  • Received the 'Secured by Design' award
  • Ideal for use on unoccupied properties
  • Re-usable so can be used again and again

Please note: The uPVC door is for illustration purposes only.


The Letterblox Kit has been designed to fit most letterbox apertures. For a full contents list, please see below:

  • External Steel Plate
  • Internal Steel Plate
  • 2 x 30mm Knobs
  • 2 x 50mm Knobs
  • 2 x 70mm Knobs
  • 6 x Spacing Washers
  • Foam Gasket
  • Sizing Gauge
  • Magnetic Letterblox Sign
  • Instruction Sheet
  • Ziplock Bag
Installation Instructions

Installation Step 1

Carefully remove your existing letter plate from the door you wish to fit the Letterblox to. Place your removed letter plate and all fixings into the supplied ziplock bag to ensure all components are kept together and are easily accessible should you wish to refit your original letter plate in the future.

Installation Step 2

Use the supplied sizing gauge to determine the thickness of your door and select the corresponding components from the Letterblox kit to ensure that a secure fit can be achieved.

Installation Step 3

Place the exterior plate into the external letterbox aperture (so the protruding section is facing inwards). The foam gasket can then be fitted over the protruding section as this will help to hold the plate in place when fitting the interior plate.

Installation Step 4

Place the interior plate over the internal letterbox opening and connect both plates using the knobs and spacers selected in Step 2. Loosely screw the knobs into place so that both plates are held together.

Installation Step 5

Ensure the Letterblox is straight and tighten the knobs to ensure that both plates are fixed against the door and are providing a secure seal. If the fitment is too loose / tight, try a different combination of knobs / spacers until the desired fitment is achieved.

Technical Data

Technical Data

This is the technical data for the Letterbox Vandalism and Arson Protection - Letterblox.

Weight 3.00kg
Dimensions (HxWxD) External Plate: 70x330x3mm (Excluding Connector Bar)
External Plate with Bar: 70x330x23mm (Including Connector Bar)
Internal Plate: 70x330x3mm
Material Main Body: Steel Plates
Fixings: Plastic / Foam / Steel Bolts

Key Product Features

Supplied with ziplock bag for safe storage of original letterplate.

Supplied with foam gasket to avoid damage to the letterbox aperture.

Supplied with 3 pairs of knobs with different lengths.

Supplied with sizing guide to indicate which knobs to use.

Product Dimensions

What's Included?

  • External Steel Plate
  • Internal Steel Plate
  • 6 x Spacing Washers
  • Letterblox Sign
  • Instruction Sheet
  • Ziplock Bag
  • 2 x 30mm Knobs
  • 2 x 50mm Knobs
  • 2 x 70mm Knobs
  • Foam Gasket
  • Sizing Gauge

Pricing & Availability

Model Stock Price
Product Code: DERLTRBLOX Stock Level:
5 in stock Expected dispatch: Tomorrow

£107.99 inc VAT

£89.99 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.68 inc VAT - Orders will be delivered in 2-3 working days by Hermes

Express Delivery

£7.80 inc VAT - Orders will be delivered in 1-2 working days by Hermes

Excellent Warranty

This product is supplied with a 2 year manufacturers warranty as standard

Looking for more information?

If you have any questions or would like more information about this product you can ask one of our specialists.

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Direct Telephone 01507 464185
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