A silver-colored letterbox with contoured edges, partially opened, showing the brand name 'Avocet' on the flap.
Technical drawing of a rectangular metal bracket with dimensions on a white background
Technical line drawing of a rectangular letterplate with a contoured front flap and internal housing. The design includes screw holes on the side flanges for mounting, and the flap is shown slightly open, indicating how mail can pass through.
Image showing four color options for metal letterplates: white, black, chrome, and gold. Each letterplate is displayed in a close-up view with a clean, modern design, and each variant is labeled with its corresponding color in a white font over an orange background.
Advertisement for Affinity brand letterplates featuring a sleek, chrome-finished metal letterplate installed on a red door. The design is contoured to match Affinity door handles, shown below the letterplate.
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 silver-colored letterbox with contoured edges, partially opened, showing the brand name 'Avocet' on the flap.Technical drawing of a rectangular metal bracket with dimensions on a white backgroundTechnical line drawing of a rectangular letterplate with a contoured front flap and internal housing. The design includes screw holes on the side flanges for mounting, and the flap is shown slightly open, indicating how mail can pass through. Image showing four color options for metal letterplates: white, black, chrome, and gold. Each letterplate is displayed in a close-up view with a clean, modern design, and each variant is labeled with its corresponding color in a white font over an orange background.Advertisement for Affinity brand letterplates featuring a sleek, chrome-finished metal letterplate installed on a red door. The design is contoured to match Affinity door handles, shown below the letterplate.Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door

Avocet Premium Quality Letterplate - Affinity Range Letterbox – uPVC & Composite Doors

AvocetSKU: HS3543

Will this fit your door? See the measuring guide ↓

162 reviews from verified buyers
Price:
£24.99

Key benefits

  • 12-inch aperture for full A4 mail - no folding, no jamming
  • Fits 80mm door thickness - weatherseal + nylon brush included
  • Tested to 50,000 operations - long-life sprung flap

100% SECURE PAYMENTS

HASSLE FREE RETURNS

FULLY TRACKED DELIVERY

Description

NEW affinity letter plate with contoured edges to complement the Affinity suited range.

  • 12 inch version to take full A4 size mail
  • To suit 38mm - 80mm door thickness
  • External flap opens up to 180 degrees
  • Fully sprung loaded
  • Finger slot for easy opening
  • Available in White, Black, Gold, Chrome , Satin Chrome and Flint
  • Contains external weatherseal and internal draught seal
  • All supplied with 2 fixing screws
  • Internal nylon brush seal to reduce air filtration

Technical Information

Assessment Data

Performance: Tested (flap) to 50,000 operations
Aperture size conforms to requirements of BS EN 13724:2002

Material Specifications

Flap: Zinc BS1004A
Body: Zinc BS1004A

Coating Specification

Polyester Powder Coated: White & Black, 60 microns minimum coating thickness
PVD Coating: Multiple layer plating process

Payment & Security

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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

The Avocet Affinity letterplate is a high-quality door letterbox designed for uPVC, composite, and timber doors. It allows mail delivery while maintaining security, insulation, and a stylish finish for your front door.

This letterplate is designed with security in mind, helping to reduce the risk of tampering or forced access through the door. However, additional precautions may be needed for full protection. Learn more in How to Prevent Letterbox Burglary.

The letterplate is suitable for most standard uPVC and composite doors, but you should check door thickness and fixing centres to ensure compatibility before installation.

Yes, installation is straightforward for most DIY users. It typically involves removing the old letterbox and securing the new one with screws through the door, ensuring correct alignment and sealing.

Upgrading to a premium letterplate improves your door’s appearance, enhances insulation to reduce drafts, and increases security. It also ensures smoother operation and longer-lasting performance compared to lower-quality alternatives.

About the Brand - Avocet ABS

Avocet ABS is one of the UK’s leading names in high-security door hardware, trusted by homeowners, locksmiths, and security professionals for its proven protection against modern burglary techniques. Known for its ABS 3-Star Euro Cylinder, Avocet has built a reputation for developing advanced, police-approved security solutions that combine innovative engineering with long-lasting durability.

Every Avocet ABS product is designed to exceed the highest industry standards, offering anti-snap, anti-pick, and anti-drill protection to keep homes secure. The brand’s commitment to quality and continuous improvement has made it a top choice for upgrading uPVC, composite, and wooden doors with reliable, insurance-approved security.

Choosing Avocet ABS means choosing trusted technology, exceptional build quality, and maximum home protection—making it a standout brand for homeowners who demand the best in door security.

Explore Avocet ABS