This door letterbox is supplied as a full kit including a tunnel and brushes to reduce draughts and insulate the door. The inner sleeve protects the door from moisture and helps mask aperture cutting, making it ideal for composite and uPVC doors. It can be combined with matching door furniture to create a cohesive entrance. The letterbox is suitable for doors with a maximum thickness of 72mm and a minimum thickness of 42mm. It is supplied with matching stainless steel bolt-through fixings. Dimensions: 31.5cm (H) x 9.5cm (W) x 1.0cm (D). Weight: 1.8 kg. Colour: Grey. Guarantee: 5 years. Material: Mild Steel. Model Number: 91527. The Pewter Patina finish is forged from steel with contrasting textures, offering a rich appearance that suits both rustic and modern settings. Overall Size: 315mm x 92mm, Opening Size: 249mm x 41mm, Fixing Centres: 283mm.