Upgrade to greater capacity with our large size post-mounted mailbox, designed for households receiving substantial mail and medium-sized packages. Constructed from heavy-duty 16 gauge steel with galvanization and black powder coating for superior weather resistance. Mailbox Specifications: Dimensions: 21" long × 10.5" wide × 11" tall Front opening: 9.5" wide × 9" high Capacity: Fits USPS medium box (11" × 8.5" × 5.5") Material: 16 gauge steel (galvanized and black powder coated) Installation: Pre-drilled holes for mounting on 4×4 horizontal wood post Key Features: Expanded Storage Capacity The oversized interior compartment easily accommodates larger mail volumes, magazines, and medium packages, making it perfect for busy households. Premium Weather-Resistant Construction Heavy-duty 16 gauge steel with galvanization and black powder coating ensures durability through all seasons, preserving your mail from rain, snow, and sun exposure. USPS Medium Box Compatible Specifically designed to fit USPS medium boxes (11" × 8.5" × 5.5"), reducing missed deliveries and trips to the post office. Customization Options Personalize your mailbox with matching 4" aluminum address numbers (available separately with no additional shipping charge). Why Choose This Mailbox Our HC110 large mailbox delivers the perfect balance of capacity, durability, and style. Its generous dimensions accommodate today's mail needs while its sleek black finish provides a timeless appearance that enhances any property's exterior.