Stylish ABS-framed, telescopic letterbox, with metal flaps and fitted with a high performance intumescent liner. In the event of fire the intumescent liner expands rapidly and seals-off the letterbox opening, preventing the spread of fire and smoke whilst maintaining the integrity of the fire door assembly. Adjustable telescopic sleeve to suit 40-80mm.

Brand Name	Firestop
Colour	Polished Silver
Material	Steel
Fire Rating	Fire Rated to 30mins
For Internal & External Use	Yes
Suitable for FD30 Fire Doors	Yes
External Doors Aperture Height	57 mm
External Doors Aperture Width	274 mm
Fixings Supplied	Fittings Supplied
Standard	BS 476, BS EN 1634.