Galvanized Material: the material of mailboxes is galvanized. It is characterized by sturdy and unyielding to rust Large Capacity: the size of mailbox is 13 x 13 3/5 x 4 1/5, it fits small boxes, magazines, padded envelopes and so on Sturdy Lock: decaller mailbox has sturdy key lock with 2 key for security, it can prevent mails theft Details Design: inclined cover on the top is waterproof, transparent cover make you know mails status in time Detailed instructions: the package includes a detailed instructions for convenient installation