NOR400

Acoustic fire and smoke rated letterbox

Designed for Timber and Composite Doors. 
Conforms to the requirement of BS EN 13724:2002
180-degree flap means flaps won‘t snap off
Two faceplate height options: Standard 76mm or Slimline 68mm
Available to suit different mid-rail and panel thicknesses
Detachable location screws on rear plate for mass production uses
Fully Sprung loaded Individually boxed for additional protection
Lifetime tested to 50,000 cycles
All finishes salt spray tested to 480 hours(BS EN 1670)
Full weather sealing to provide a draft free environment
Fire Resistant version (with intumescent strip): 60 minute
Warrington Fire Test report (WF Report No136789) 60 minute within a section of timber based door leaf Tested to BS 476-22: 1987 Fire Tests on building materials and structures