text: Plastic bodied black frame with an aluminum face plate.
  It has a smoke, weather and draught seal.
  The Intumescent seal fits round the body of the letterbox to crush and seal in a fire.
  To fit apperture size 250mm x 35mm
  Overall size 300mm x 67mm
  This product has been included in a fire test employing the general procedures and criteria of BS476 Part 22 1987, built into a composite door, maintaining the integrity of the door for 61 minutes.
  Also tested to European Standard EN1634-1 (2000), achieving 68 minutes integrity
  Envirograf Product 49L