Intumescent & Acoustic Telescopic Letterbox

The Astro Telescopic Letter Box FS & FSA is a premium intumescent letterbox and fire door hardware solution offering fire, smoke and acoustic protection for modern buildings. With 30 minute and 60 minute fire-rated options, adjustable telescopic fitting and an intumescent seal that expands under heat, it is designed to help maintain door integrity and compartmentation. Ideal for fire doors, apartment buildings, and multi-occupancy developments, it also offers optional security cowl and latch protection plus a choice of various finishes.