NOR400 Acoustic Letterbox


  • £48.78 (Ex. VAT)

Norsound’s NOR400 acoustic letter plate comes acoustically tested up to 40db whilst also being fire- and smoke-tested to up to 60 minutes integrity. The NOR400 has been specifically made to rectify the problem of unwanted sound being transferred in doors where cutting a hole in the centre of the door for a letter plate is a necessity. Previously this may have caused significant damage to the soundproofing of the door set but the NOR400 aims to protect its acoustic properties.

Available in Gold as well as satin and polished chrome, this high quality letter plate is the perfect solution for those wanting to not only secure a fire door but who are also concerned with keeping unwanted sound to a minimum.

NOTE: Screen colour may differ from actual product colour. All technical information is given as guidance only. Please refer to our technical department for test evidence.


Manufacturer: Norsound
Fixing: Screw fix
Length: 12"
Material: Aluminium
Colour: Polished Chrome, Satin Chrome, Gold

Note: This product requires the NOR-COUSTIC mastic to fit it. You may also buy this from us here.

* Due to the technical nature of our products they are designed to be installed by a professional.
* Actual product may vary from images.
** All information given is for guidance purposes only. Information is offered in good faith but cannot be used in place of current test evidence.
*** Diagrams not to scale.
**** Information is to the best of our knowledge and we reserve the right to change specification without notification.

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