black, gibraltar extra-large steel post-mount mailbox - new (black-1) shadow walker extra-large steel post-mount mailbox - black the extra-large size galvanized steel post mount mailbox is constructed from heavy-duty galvanized steel and has a durable ribbed body for extra strength. the mailbox is an extra-large capacity unit that can accept various mail types including magazines and small parcels and can hold large volume mail deliveries or day's worth of mail. the mailbox features a rust resistant powder coat finish for lasting durability and stylish curb appeal. product specifications: protective qualities: rust-resistant dimensions: 25.1 inchesh x 12 inchesw x 15.3 inchesd