The Gibraltar Whitley mailbox post is wonderfully designed to fit over a 4x4 post for a straightforward installation. Its tough plastic material will provide strength and protection against outside elements. Proudly made in the USA, mounting hardware is included for your convenience.

• Compatible with all M and L capacity Gibraltar Post-Mount Mailboxes like the E1100W00 and E1600W00
• All mounting hardware included
• Heavy-Duty plastic construction provides durability and protection against weathering
• Installs easily over the Gibraltar 4x4 Easy-Install Anchor Post Kit - APK00000
• Made in the USA