A set of four Slimline uPVC door letterboxes in different finishes: gold anodized, white powder coat, black powder coat, and satin silverized. Each letterbox has a reflective brush seal and a flap that is capable of opening 180 degrees.
Slimline uPVC door letterbox with black frame and silver flap.
Letterplate cavity dimensions: 288mm wide, 29mm high, 280mm between fixing holes.
Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door
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A set of four Slimline uPVC door letterboxes in different finishes: gold anodized, white powder coat, black powder coat, and satin silverized. Each letterbox has a reflective brush seal and a flap that is capable of opening 180 degrees.Slimline uPVC door letterbox with black frame and silver flap.Letterplate cavity dimensions: 288mm wide, 29mm high, 280mm between fixing holes.Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door

Slimline uPVC Door Letterbox Anti Snap – uPVC & Composite Doors

UAPSKU: HS3879

Will this fit your door? See the measuring guide ↓

162 reviews from verified buyers
Price:
£21.99

Key benefits

  • Anti-snap design - stops fishing-style attacks through the slot
  • Slimline profile - discrete fit on uPVC and composite doors
  • Adjustable to door thickness - telescopic sleeve included

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Description

Our Slimline Anti Vandal Letterplates are the letter plate of choice for anyone concerned about home security. Each of our letterplates has 4 major anti-vandal features giving you extra security at home from vandals and burglars.

Lengths available: 12"

Door Thickness: 40-80mm

See images for detailed size specification

Conforms to British Standard/EN 13724:2002

Internal brush seals for improved draught exclusion

Two or four screw fixing options

Anti-Burglar: blind bolts to the exterior of the letterplate prevents the outer frame being unscrewed from the door externally

Anti-Vandal: outwards facing brushes mean better draught proofing, easier posting and they prevent vandals placing unwanted items in the cavity

Anti-Snap Flap: Letterplate flaps can open to 180 degrees, meaning that they will not snap. An internal water seal prevents water getting into the door or panel and ultra-flexible springs withstand thousands of openings without breaking

Anti-Scratch Frame: matt coated frame conceals scratches that may be caused by screwdrivers during installation

Unsure how to measure your existing letterbox, view our simple 3 step measuring guide here

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Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door

Not sure if this letterbox will fit your door?

Before ordering, take three measurements from your existing letterbox opening. If all three match the dimensions listed above, this letterbox will fit your door perfectly.

Cut-out width
Measure the full horizontal length of the opening in your door from edge to edge. This is the most common size to match — typical UK letterboxes are between 250mm and 300mm wide.

Cut-out height
Measure the vertical height of the opening from top to bottom. Most UK letterbox cut-outs are between 40mm and 75mm high.

Door thickness
Measure the thickness of your door from front face to back face. UK uPVC and composite doors are typically 44mm or 70mm thick.

Got all three? You're good to go.

Still unsure? Send a photo of your existing letterbox to info@homesecureshop.co.uk and we'll match it for you — or call 0151 521 8089 to speak to our team.

Full measuring guide

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Frequently Asked Questions

A slimline uPVC door letterbox anti-snap is designed to allow secure mail delivery while helping protect your door from tampering. Its slim profile suits modern uPVC doors and enhances both security and appearance.

An anti-snap letterbox helps reduce the risk of forced entry or tampering through the letterplate area. It adds an extra layer of protection to your door. Learn more in Best Letterbox for uPVC Doors: How to Choose the Right One.

Compatibility depends on door thickness and fixing centres. It’s important to measure your existing letterbox and door to ensure the new one will fit correctly.

Yes, installation is usually straightforward. You can remove the existing letterbox and fit the new one using the provided fixings, ensuring proper alignment and sealing.

Upgrading improves security, enhances insulation against drafts, and provides a cleaner, more modern look. It also ensures smoother operation and long-lasting performance.