"Complete your door with the UAP Framemaster 12"" Satin Gold Aluminium Letterbox, designed for reliable performance and a stylish modern finish. Suitable for wooden, composite and uPVC 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 ensures accurate alignment and a secure fit on both sides of the door, making it suitable for both new installations and straightforward replacements. Built from durable materials and tested to BS EN 13724 2013, it includes high strength springs that withstand more than 100,000 opening and closing cycles. The satin gold finish is weather resistant and easy to maintain, while installation is simple with the included alignment screws and fixings.• Fully tested to BS EN 13724 and cycle-tested over 100,000 times, this letterplate delivers dependable quality and smooth operation for years to come.• Distance Between Screw Holes: 272 mm• Letterplate Length: 300 mm• Letterplate Height: 74 mm• Cavity Hole Size: 257 mm × 42 mm."