"The UAP Doormaster 12"" Black Letterplate is designed for secure, durable and draught-proof performance on uPVC, composite and wooden doors. With internal and external flaps, outward-facing brushes and a corrosion-resistant frame, it delivers smooth letter handling and reliable protection against draughts and tampering. Suitable for 20-40mm door profiles and supplied with all fixings included, it offers a quick, practical and long-lasting upgrade for any front door.Key Features• Internal & External Flaps: Dual-flap design improves insulation, security and smooth everyday letter handling.• Draught Excluder Brushes: Outward-facing brushes reduce draughts and increase energy efficiency.• Fits 20-40mm Doors: Ideal for uPVC, composite and wooden door profiles within standard UK ranges.• Durable, Corrosion-Resistant Build: Designed for long-lasting performance in all weather conditions.• Anti-Vandal Features: Brushes and secure fixing points help deter tampering and unwanted items.• Smooth 180° Flap Opening: Strong springs ensure reliable operation without snapping or sticking.• Easy Installation: Simple, secure fitting with supplied screws and clear alignment.• Distance Between Screw Holes: 272 mm• Letterplate Length: 300 mm• Letterplate Height: 74 mm• Cavity Hole Size: 257 mm × 42 mm."