Mail Slot is made from solid brass material and available in many finishes. Mail Slot has an external spring loaded flap on the exterior and a frame on the interior. Installation hardware is included making it quick and easy. Enhances the overall appearance of any Entryway. Brass-tone PVD finish over a stainless steel substrate. Hole size required: 2-3/4 in x 11-5/8 in, size: 3-5/8 in x 13 in.