Astro FX Telescopic Letter Box (30-60min) 12 inch
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A commercial grade telescopic letterbox engineered to preserve the fire performance of FD30 and FD60 doors. The intumescent liner expands under heat to seal the aperture and help maintain door integrity. Telescopic side sections allow fitting to a range of door thicknesses. Brush pile draught excluders and sound dampening bumpers improve usability, while the metal frame and flap deliver a professional, durable finish suitable for residential and multi-occupancy installations.
Key Features
- 30 or 60 minute fire integrity and smoke control.
- 12" overall frame width for standard mail delivery.
- Telescopic fittings to suit various door thicknesses.
- Intumescent liner that expands to seal the aperture under heat.
- Brush pile draught excluders for improved thermal and acoustic performance.
- Sound dampening bumpers for quieter flap operation.
- Flap opens to approximately 115 degrees for easy mail access.
- Satin anodised aluminium finish for a modern, durable look.
Specification at a glance
- Fire rating: 30 or 60 minutes, fire and smoke.
- Overall dimensions: 306 mm wide x 70 mm high (12" x approx. 2.75").
- Cut-out required: 274 mm x 57 mm.
- Flap opening angle: approx. 115 degrees.
- Finish: Satin anodised aluminium.
Installation & Maintenance
- Install with a competent installer and confirm compatibility with the door manufacturer.
- Ensure the cut-out dimensions are accurately prepared before fitting.
- Inspect annually and after any impact or fire exposure.
- Replace if intumescent material or seals are damaged.
- Keep maintenance records and confirm ongoing compliance with building requirements.
Includes / Delivery
- Supplied as one complete letterbox unit with metal frame and metal flap in satin anodised aluminium.
- Specify finish and quantity when ordering.
- Contact us for lead time and shipping options.
Compliance
- Supplied with appropriate test evidence for 30 and 60 minute installations where applicable.
- Purchaser must ensure correct specification and compatibility with door construction and installation requirements.
Shipping & Returns
WHY CHOOSE PREMIER?
40+ Years of Trust
With over 40 years of combined experience, our team has been trusted by domestic and commercial customers across the UK. We work with fully certified, highly skilled independent installers - including those with FIRAS and BM Trada credentials -to deliver fire door sets you can rely on. Every product and service is backed by decades of hands-on expertise and a commitment to high-quality results.
No Quibble Returns
We want you to feel 100% confident when ordering with us. That’s why we offer No Quibble Returns on all eligible items.
- Items must be in original packaging, and in the same condition you received them.
- Bespoke or made-to-order items are non-refundable.
- Simply email us at sales@activefiresafety.com to request your return.
- We’ll send you a return label and instructions - we make it easy.
- Refunds are processed once your item is received and approved.
For more information, visit our Refunds & Returns Policy
Real Human Support
We get it! There’s nothing worse than needing help and only getting AI bots or auto-replies.
When you contact us, you’ll speak to a real person who knows fire safety and actually wants to help.
Whether you’ve got questions before buying or need support after your order, we’re here every step of the way. No ticket numbers, no frustrating loops, just real answers.
Straightforward Shipping
Shipping costs are clearly shown before you checkout. We work with trusted couriers to ensure smooth and fast trackable delivery straight to your door.
