This premium and secure letterbox plate and seal from Exitex is for internal use only. It features durable, long-lasting draught-proofing bristles, an aluminium casing, and a spring-closing flap, fitting most standard letter plate cutouts. The seal is designed to keep out rain, dust, and draughts, helping to keep your home warm. Specifications: - Spring action flap - Aluminium casing available in silver and gold - For internal use - All around seal - All screw fixings included Dimensions: - Total unit dimensions: - Hole to hole fixing centre: 274mm - Length: 293 mm / 11.5" - Height: 75 mm / 3" - Depth: 12 mm / 0.5" - Letterbox aperture (with bristles): - Length: 255 mm / 10" - Height: 40 mm / 1.6" - Depth: 10 mm / 0.4"