Mail Slot is made from solid brass material and available in many finishes. Mail Slot has flaps on both sides of the door. The exterior is a spring-loaded flap and the interior is a gravity flap. Installation hardware is included making it quick and easy. Adds charm and distinction to any Entryway. Hole size required: 2-3/8 in x 8-3/8 in, size: 3 in x 10 in.