Welseal HS3747 10 Inch UPVC Door Letterbox Letter Plate Mid Rail Polished Gold/Black

Smooth, rounded design with sprung internal and external flaps Internal brush seals for improved draught exclusion Draught protection provided internally by twin nylon brush seals Secure fixing from inside by two screws External Dimensions: 265mm in length x 70mm width Internal Dimensions: Sleeve aperture size - 223mm x 44mm width (min size hole in door that the letterbox will fit) Distance between screw hole centres: 236mm To suit door thicknesses of 38mm - 78mm (Midrail fitting), Manufacturer: Welseal