Architectural Mailboxes Oasis Post-Mount Locking Mailbox is ideal for receiving mail and small parcels, making it great for catalog and internet shoppers. Rubber seals on the doors help keep deliveries clean and dry. The powder coating helps this mailbox stand up to most weather conditions and helps maintain an attractive appearance. The stainless steel cam lock provides a secure access door for extra protection and includes 2 keys. Size: 18.2 In. Color: Black.