Step2 Mailmaster Storemore Mailbox with Storage, Multicolor This storage mailbox has front and rear mail doors that allow for safe mail retrieval. The removable floor covers a large of 28"H x 6.25"W x 13.25"D (71.1 cm x 15.9 cm x 33.7 cm) mail storage receptacle. Features hidden access door locks for security and opens downward for easy access. This mailbox is made of heavy-duty poly construction, mounts simply on a standard 4" x 4" (10.2 cm x 10.2 cm) post. Mailbox post sold separately. Includes two keys, address numbers and mounting hardware. Adult assembly required.