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10 Best letterboxes for upvc doors 12 inches of 2025
Telescopic Sleeve - The Telescopic Sleeve Can be Adjusted to Suit Doors Between 40mm to 80mm In Thickness
Fully Weather Sealed - The Integrated Internal Nylon Brushes Reduces Cold and Draughts - The External Letterbox Flap Features a Foam Seal for Full Draught and Weatherproof Sealing
Dimensions - The Letterbox Overall Size Measures 326mm in Length x 79mm in Height - Internal Postal Dimensions of the Sleeve Measures 250mm x 39mm - The Minimum Size Hole in the Door this Letter Box will Fit Measures 259 X 48mm
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SIZE - Letterbox 12 inch (300mm x 65mm) with White internal & external flaps contained in a Black Frame. 280mm screw centres.
Premium 12" Door Letter Box, Draught Proof Postal Door Letterboxes. Suitable for Doors 40-80mm Thickness. With outward facig Brushes for draught proofing.
Door Letter Box Flap - Both the external and internal letterbox flap opens to 180 degrees for easy access and to prevent them from snapping off when opened too far.
The letterplate is available in multiple powder-coated finishes such as White and Black, as well as plated multi-layer finishes like Chrome, PVD Gold and Satin Silver It’s designed to suit doors with a thickness of 40mm to 80mm and is compatible with timber, composite, and uPVC doors.
Crafted from high-quality materials, including zinc alloy or 304 stainless steel, the letterplate is built to last. It features corrosion resistance, tested for up to 480 hours in a neutral salt spray test, and is available in a variety of finishes to match your door’s aesthetic. Its easy installation ensures it’s a hassle-free upgrade to any home or business.
12 Inch Letterbox, 40-80mm Door Thickness, External Dimensions: 310mm (W) x 68mm (H) Internal Dimensions (Sleeve Size): 262mm x 45mm (minimum hole size required) Distance Between Screw Holes: 270mm
SIZE - Letterbox 12 inch (300mm x 65mm) with Polished Silver internal & external flaps contained in a Polished Silver Frame. 280mm screw centres.
Premium 12" Door Letter Box, Draught Proof Postal Door Letterboxes. Suitable for Doors 40-80mm Thickness. With outward facig Brushes for draught proofing.
Door Letter Box Flap - Both the external and internal letterbox flap opens to 180 degrees for easy access and to prevent them from snapping off when opened too far.
PROTECTION: This doorway guard creates an invisible barrier to keep out dust, debris and pests, for a clean and worry-free life in both domestic and commercial spaces.
PACKAGING AND SIZE: This internal mailbox windshield measures 305mm x 70mm,the hole spacing of the screws is very important when installing,the hole spacing of the mailbox cover screws must be 275MM, if it is not that size it will not be able to complete the installation to ensure that this is a qualified replacement. (Please note: the 325 x 50 letterbox cover does not have an internal brush)
ADJUSTABLE FLAPS: The telescopic design means the letterbox can be adjusted and both the external and internal flaps can be opened 180 degrees to prevent breakage, suitable for doors from 40mm to 80mm thick. Please ensure this is a qualified replacement.
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.
WIDE OPENING FLAP - You’ll never miss a letterbox delivery again with our wide-opening flap and near 180° rotation, making it easy to receive letters, small parcels, and magazines without damage. With heavy duty spring hinges and a sculpted recess for easy opening, Enigma letterbox flaps guarantee smooth operation and long-lasting performance.
SUPERIOR QUALITY - We’re passionate about the quality of our hardware here at IRONWORX. That’s why our Enigma letter boxes are ultra durable and vigorously tested to a minimum of 20,000 open/close cycles and over 480 hours salt spray testing. Plus, they’re accredited with British Standard BS EN 13724 Classification, undergo extreme weather performance with all colour finishes, and are accredited to BS EN 1670 Grade 5.
PREMIUM METAL LETTERBOXES FROM IRONWORX - IRONWORX is a home-grown brand, known for designing and supplying high-quality, door and window furniture right here in the UK. Whether you’re fed up with soggy post, tired of flimsy plastic alternatives, or simply want to mix up the look of your front door, the unique features of IRONWORX Enigma Premium Slimline metal letterboxes are the solution.
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