Magflap® MK3 | Horizontal Letterbox Draught Excluder

£39.99 GBP

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Color: Black

Locking Keyset (optional) Allows for internal manual locking. Without Keyset With Keyset

Additional Gasket - Allows for 18mm of nut or bolt clearance. No Yes

Further Details

The additional gasket allows for 18mm of clearance over protruding nuts or bolts.

Internal or External fitment: Installed on the inside of the door for a clean look and added security or mounted externally to stop draughts and rain.

Design: Fits standard UK letterboxes (ideal for retrofits and new builds)

Engineered All-Steel Construction — Durable, rust-resistant with a powder-coated finish

Magnetic Seal Technology — Precision magnets create a tight, secure seal.

Zero-Brush Design — No bristles, no fraying, no draught leakage over time

Wind Resistant — Holds firm under pressure, improving thermal efficiency

Easy Self-Fit — Install in under 10 minutes, no specialist tools required

Compatible With — Wood, uPVC, metal, and composite doors. Please see our fitting guide for more information on how to fir your Magflap product.

Optional Add-Ons

Rear Gasket Add-On — Adds up to 18mm clearance for protruding bolts, nuts, or uneven surfaces

Internal Locking Keyset — Prevents tampering and letterbox fishing

Sustainability & Origin
99% Recyclable — Built using sustainable materials

Made in the UK — Family-run business since 2009, manufactured in small batches for quality

Quantity

Family Owned
Free Returns
Fast Shipping

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EASY USE

Versatile Installation

Can be fitted internally or externally, offering flexibility for various door types. Can be fitted by you or a trusted installer, see our guide below.

Fitting Guide

Proven Thermal Technology

Whether you are in a hot climate keeping the cold in or a cold climate keeping the heat in, the Magflap MK3 is thermally effective

FUSS FREE

Brushless Design

All of our products are brushless. Our perfectly balanced Magman strength magnets eliminates the need for bristles, ensuring a smoother, longer-lasting performance.

The Iconic

Magman® Seal

A strong magnetic seal ensures no gaps for air to seep through, preventing draughts all year round.

carefully crafted for over 15 years

Family Owned

Our mission is to restore the brilliance of British craftsmanship.

About Magman

3 Year Warranty

Not only does our product come with a 3 year warranty, if you move house and remove your Magflap you can send it back to us to be refurbished ready to install at your new home.