"This UAP Doormaster 12"" Letterplate offers a secure, durable, and weather-resistant solution for uPVC, composite, and wooden doors. Designed for everyday use, it features strong aluminium flaps, smooth operation, and a modern finish that suits a wide range of home exteriors. Its telescopic design ensures a reliable fit on 20-40mm doors, making it ideal for both replacements and upgrades.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 20-40mm 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: 272 mm• Letterplate Length: 300 mm• Letterplate Height: 74 mm• Cavity Hole Size: 257 mm × 42 mm."