Intumescent Letterbox Assemblies 254mm. SSS Black British Standard BS3621 Rated Sashlock

British Standard BS3621 Rated Sashlock used as a matter of course by the national house builders

The handle is slender at each end with a broader middle allowing for a comfortable ergonomic grip

Lever Action Flush Bolt with a Radius end

Firestop€™s high performance intumescent core contains intercalated graphite which in the event of a fire expands multi-directionally up to 10-15 times its original size sealing the gap and holding the fire door in place

the stainless brass PVD long-life finish offers a 25 year finish guarantee

Intumescent Letterbox Assemblies 254mm. SSS Black British Standard BS3621 Rated SashlockIntumescent Letterbox Assemblies 30 min's Fire Protection. 254mm BS EN 1935. Smokeproof. Comes with a 10 year mechanical guarantee and is Fire door rated. A stylish ABS framed, adjustable telescopic sleeved 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