Kilargo IS7061 Meeting Stile Seal For Plain or Rebated double doorsConforms with BCA Specification C3. 4 smoke sealing A door sequence selector must be installed unless one leaf is intended to be fixed An astragal seal used with either plain or rebated meeting stiles on the single swing, double doors (where only one door leaf is active) Suitable to be used on double smoke doors and all other doors but Not suitable for fire doors provides an excellent acoustic, smoke, light, dust, and weather seal The thin fixing leg