"Give your front door a reliable and modern upgrade with the UAP Doormaster 10"" Silver Draught Proof Letterbox, designed for smooth operation, strong durability and everyday convenience. Suitable for uPVC, composite and wooden doors 40 to 80mm thick, it includes internal and external flaps to improve insulation, reduce draughts and support secure, easy letter handling. Following UAP’s trusted Doormaster design, it offers reliable compatibility with a wide variety of front doors.Key Features• Internal & External Flaps: Dual-flap design improves security and provides smooth letter handling on both sides of the door.• Durable Aluminium Construction: Strong, corrosion-resistant aluminium flaps paired with an anti-scratch frame for long-lasting performance.• Patented Anti-Snap Design: Flaps open to 180° for easy access without risk of snapping or damage.• Adjustable 40–80mm Fit: Telescopic structure allows secure installation on uPVC, composite, and wooden doors.• Fast, Accurate Installation: Single fixing screw on each side auto-aligns with the screw boss for a quick, secure fit.• 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: 226 mm• Letterplate Length: 250 mm• Letterplate Height: 65 mm• Letterplate Width: 40-80 mm."