The Mail Slot is constructed of heavy-duty steel to withstand the outside weather elements providing a lasting durability. The slot features a spring loaded front plate with an interlocking flap for a tight and secure closure. The 11-1/2 in. opening of the slot allows plenty of space for successful mail delivery of various mail types and is a great alternative for home deliveries. The mail slot includes mounting hardware and an actual template for easy installation.. Constructed from durable steel. Spring loaded front plate with an interlocking flap for a tight and secure closure. Includes mounting hardware and an actual size template for easy installation. 11-1/2 in. opening allows plenty of space for various mail types and successful mail delivery. Approved by the United States Postal Service Postmaster General. Finish Family: Brass and Gold. Assembled Width (in.): 11.5 in. Assembled Height (in.): 2.8 in. Shape: Rectangle. Included: Mounting Hardware