mail slot plate - MailSlot - Wikipedia asia 888 slot

A letter box, letterbox, letter plate, letter hole, mail slot or mailbox is a receptacle for receiving incoming at a private residence or business.

[ ! ]T-slot covers are used in reverse as Plate Covers. HFS5 can hold a 3mm plate, HFS6, HFS8 and HFS8-45 can hold a 5mm plate. [ !

A mail slot catcher can be placed on the interior side of the door to collect mail. Also, mail slots deter mail theft as passerby cannot reach into a slot and retrieve mail as one could with a mailbox.