- 20% off
From The Anvil
From The Anvil - Polished Chrome Traditional Letterbox
Sale price £302.13 (Inc. VAT) Normal Price: £377.66 £251.78 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 254 x 56mm PB - Polished Brass
Sale price £51.94 (Inc. VAT) Normal Price: £64.92 £43.28 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 254 x 56mm CP - Polished Chrome
Sale price £51.94 (Inc. VAT) Normal Price: £64.92 £43.28 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 254 x 56mm - Polished Gold
Sale price £43.68 (Inc. VAT) Normal Price: £54.60 £36.40 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 254 x 56mm SAA
Sale price £43.68 (Inc. VAT) Normal Price: £54.60 £36.40 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 305 x 56mm. PB - Polished Brass
Sale price £59.81 (Inc. VAT) Normal Price: £74.76 £49.84 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 305 x 56mm. CP - Polished Chrome
Sale price £59.81 (Inc. VAT) Normal Price: £74.76 £49.84 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 305 x 56mm - Polished Gold
Sale price £51.94 (Inc. VAT) Normal Price: £64.92 £43.28 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 305 x 56mm SAA - SAA
Sale price £51.94 (Inc. VAT) Normal Price: £64.92 £43.28 (Ex. VAT)Unit price /Unavailable - 20% off
Eurospec
Eurospec - Intumescent Letterbox Assemblies 254 x 56mm. SSS - SSS
Sale price £51.94 (Inc. VAT) Normal Price: £64.92 £43.28 (Ex. VAT)Unit price /Unavailable - 20% off
Carlisle Brass
Carlisle Brass - Sleeve Letter Plate 300 x 69mm - SAA
Sale price £28.51 (Inc. VAT) Normal Price: £35.64 £23.76 (Ex. VAT)Unit price /Unavailable - 20% off
Carlisle Brass
Carlisle Brass - Sleeve Letter Plate 300 x 69mm - Gold Anodised Aluminium
Sale price £30.05 (Inc. VAT) Normal Price: £37.56 £25.04 (Ex. VAT)Unit price /Unavailable

Why Choose a Telescopic Letter Plate?
The Ideal Draught-Proof Letterbox Solution for uPVC, Timber & Composite Doors
A telescopic letter plate is more than just a mail slot—it's a practical solution for sealing the gap between the inner and outer door surfaces, especially on uPVC and composite doors. These letter plates feature an extendable internal sleeve that ensures a snug fit across a range of door thicknesses, making them easy to retrofit without complex joinery.
Thanks to integrated brushes and optional fire-rated variants, telescopic letterboxes help to reduce draughts, improve thermal performance, and support compliance on apartment and commercial entrances. Many options are compatible with fire doors, timber doors, or replacement front doors across the UK.
We supply a wide range of architectural ironmongery to complement your letter plate installation—browse our full Door Furniture and Door Chains collections to finish the look. You’ll also find matching Escutcheons, Cylinder Pulls, and Bell Pushes to complete the front door suite.
Frequently Asked Questions
What is a telescopic letter plate?
What is a telescopic letter plate?
A telescopic letter plate has a connected inner sleeve between its flaps, sealing the door cavity and preventing draughts or water ingress.
Can I use a telescopic letter plate on a timber door?
Can I use a telescopic letter plate on a timber door?
Yes — while designed for uPVC and composite, many models are suitable for timber doors too, especially with retrofit backing plates.
Do these come in black, brass, and stainless steel finishes?
Do these come in black, brass, and stainless steel finishes?
Absolutely. We offer over 20 finish options including matt black, antique brass, polished chrome, and marine-grade stainless steel.