"Complete your door with the UAP Framemaster 12"" Black Aluminium Draught Proof Letterbox, designed for reliable performance and a clean modern look. Suitable for uPVC, composite and wooden doors 20 to 40mm thick, it features internal and external flaps that improve insulation and support smooth day to day letter handling.The telescopic sleeve system provides secure alignment on both sides of the door, making this letterbox a practical choice for new installations or straightforward replacements. Built from durable materials and tested to BS EN 13724 2013, it includes high strength springs that withstand more than 100,000 open and close cycles. The weather resistant black finish maintains its appearance over time, and the included fixings enable quick and simple installation.Key Features• Quality Tested to BS EN 13724: Built to withstand over 100,000 opening/closing cycles for dependable performance.• Industry Standard Replacement: Trusted Doormaster design ensures smooth integration with a wide range of door styles.• Distance Between Screw Holes: 272 mm• Letterplate Length: 300 mm• Letterplate Height: 74 mm• Letterplate Width: 40-80 mm• Cavity Hole Size: 257 mm × 42 mm."