Norsound NOR400 Acoustic Letterbox Alu Frame
Norsound NOR 400 Acoustic Letterboxes 60min
Available in 12" with an Aluminium frame and a range of colour options (Gold, Satin Chrome, Polished Chrome).
Advantage fire rated letterbox, 60 minutes depending on the application. The Norseal Letterplates have been acoustically tested to 40dB Rw. Externally sprung flaps open to approx 147 degrees. Frame may vary from picture. Available 12" only.