National Supply Co.

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SKU: 75870|UPC: 720158758706
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Protect your mail and upgrade your home’s exterior with this large locking outdoor mailbox measuring 21" x 11.2" x 10.5". Built from heavy-duty galvanized steel, this mailbox offers long-lasting durability and resistance against rust, corrosion, and harsh weather conditions.
The secure locking system helps protect letters, checks, and small packages from theft while keeping your mail safe until retrieval. Its reinforced anti-pry design and reliable key lock provide additional security for residential or commercial use.
The spacious interior allows the mailbox to hold several days of deliveries, including envelopes, magazines, and small parcels. The wide mail slot allows postal carriers to deposit mail easily while maintaining the mailbox’s secure structure.
Finished with a weather-resistant powder coating, this mailbox is designed to perform reliably outdoors while maintaining its sleek and modern appearance. It is suitable for houses, apartments, offices, and businesses looking for a durable and secure mailbox solution.
Combining security, durability, and modern style, this large locking mailbox is an excellent choice for anyone looking to protect their mail and enhance their property’s exterior.


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Suitable for automotive metal, plastic trim, and properly prepared body panels. Always test adhesion on a small area first.