VEVOR Through The Door Key Drop Box, Heavy Duty Steel Through the Door Mailbox with 1.8" 12" Key Lock, 12x6x16" Mail Drop Box, BlackProduct Features Rainproof Design Our through the door 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 door drop box includes an 11. 9 x 4. 2 x 15.