Vevor Mailbox Through-the-Wall Drop Box 13" x 7" x 17" Black NewThe Vevor through the wall drop box is a heavy duty steel mailbox designed to help keep mail, keys, checks, and small parcels secure. Its rainproof flap, drainage holes, and rubber pads help protect contents from moisture. A combination lock and internal anti theft baffles add privacy and security without requiring keys. The adjustable slide design fits a range of wall thicknesses for flexible installation in homes, offices, workplaces, or schools.