---
product_id: 446865242
title: "12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black)"
brand: "keypak"
price: "A$58"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/446865242-12-inch-30-6cm-door-letterbox-fits-40-80mm-doors
store_origin: AU
region: Australia
---

# Adjustable fit 40-80mm doors Internal draught excluder brush Anti-snap flap 180° open 12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black)

**Brand:** keypak
**Price:** A$58
**Availability:** ✅ In Stock

## Summary

> 📬 Upgrade your door game with style and smart protection!

## Quick Answers

- **What is this?** 12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black) by keypak
- **How much does it cost?** A$58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/446865242-12-inch-30-6cm-door-letterbox-fits-40-80mm-doors)

## Best For

- keypak enthusiasts

## Why This Product

- Trusted keypak brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seal Out the Elements:** Integrated internal draught excluder brush and water seal block cold air and moisture, keeping your home cozy and dry.
- • **Perfect Fit, Every Time:** Telescopic sleeve adapts seamlessly to door thickness from 40mm to 80mm, ensuring a flawless installation on UPVC, composite, or timber doors.
- • **Sleek & Discreet Design:** Matte black finish blends effortlessly with modern door aesthetics, adding a subtle yet sophisticated upgrade to your entryway.
- • **DIY Friendly Installation:** Clear, simple instructions make upgrading your door’s letterbox a quick and satisfying weekend project.
- • **Built to Last, Designed to Protect:** Anti-snap flap opens a full 180°, preventing damage and guaranteeing smooth, durable operation for years to come.

## Overview

This 12-inch adjustable letterbox fits doors 40-80mm thick, featuring a robust anti-snap flap that opens 180° for easy access, plus an internal draught excluder brush and water seal to prevent leaks and drafts. Its sleek black design suits UPVC, composite, and timber doors, combining durability with modern aesthetics for a hassle-free installation.

## Description

12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black)

## Features

- INTERNAL DRAUGHT EXCLUDER – The integrated brushes help prevent draughts. Plus, an internal water seal prevents water leaks as it stops water getting into the door or panel.
- ANTI-SNAP FLAP – The flap opens a full 180 degree for easy access and to prevent it from snapping off when opened too far.
- ADJUSTABLE SLEEVE – The telescopic design means the letter box can be adjusted to fit doors between 40mm to 80mm in thickness. Our letter box will fit most uPVC, Composite & Timber doors.
- DIMENSIONS – The letter box overall size is 306mm x 70mm and the internal dimension of the sleeve is 254mm x 37mm. The distance between the screw hole centres is 280mm. Suitable for apertures between 285mm x 50mm up to 295m x 60mm
- EASY TO INSTALL – Please read product description below for a simple guide on how to install the letterbox.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Keypak |
| Part Number | B54212-03EL |
| Product Dimensions | 30.48 x 3.7 x 8 cm; 480 g |
| Item model number | B54212-03EL |
| Size | 40-80mm |
| Colour | Black/Black |
| Material | Foam, Rubber |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 480 g |

## Product Details

- **Colour:** Black/Black
- **Material:** Foam, Rubber
- **Brand:** keypak
- **Product dimensions:** 30.5L x 3.7W x 8Th centimetres
- **Maximum gap fill:** 80 Millimetres

## Images

![12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black) - Image 1](https://m.media-amazon.com/images/I/61x-vXpvh1L.jpg)
![12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black) - Image 2](https://m.media-amazon.com/images/I/716qK0n6BaL.jpg)
![12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black) - Image 3](https://m.media-amazon.com/images/I/61VkdgkA3SL.jpg)
![12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black) - Image 4](https://m.media-amazon.com/images/I/71w3Y99BxDL.jpg)
![12 inch (30.6cm) Door Letterbox - Fits 40-80mm Doors, Anti-Snap Flap, Internal Draught Excluder Brush, Adjustable Letter Box for UPVC Composite Wood Doors (Black/Black) - Image 5](https://m.media-amazon.com/images/I/715oyBk-xyL.jpg)

## Available Options

This product comes in different **Colour Name, Size Name** options.

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**Shop now:** [https://www.desertcart.com.au/products/446865242-12-inch-30-6cm-door-letterbox-fits-40-80mm-doors](https://www.desertcart.com.au/products/446865242-12-inch-30-6cm-door-letterbox-fits-40-80mm-doors)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-22*