VEVOR Through The Wall Drop Box, Heavy Duty Steel Through the Wall Mailbox with 2.8-7.9" 13" Combination Lock, 12.5x6.3x16.9" Mail Drop Box, Dark GrayProduct Features Rainproof Design Our through the wall key drop box features a safety rainproof design with a large shield placed in front of the delivery slot, ensuring the security of important mail even during heavy rainfall. The bottom of the box is equipped with rubber pads and drainage holes to quickly remove accumulated water, preventing mail from getting wet. Large Storage Box & Slot The through the wall drop box includes a 12. 5_6. 22_16. 9