Gibraltar Deluxe Square Drive-In Post Kit is a steel post kit designed for durability and ease of use. This deluxe square drive-in post features an adjustable cross arm and is compatible with all Postmaster rural mailboxes, making it a versatile choice for mailbox installation. The post measures 35-1/4 inches in height, 5-3/4 inches in width, and 3-1/2 inches in depth, providing a sturdy and reliable support for your mailbox. Packaged in a box, this kit includes one post, ensuring you have everything needed for a secure setup. Model Number: SDPK