Check the listing for details. Gibraltar Whitley 4x4 Rust-Proof Plastic Cross-Arm White Mailbox Post, WP000W01. Color: White, Condition: New. Listed at 68.89 USD. This Gibraltar Whitley 4x4 Rust-Proof Plastic Cross-Arm Mailbox Post is the perfect addition to your mailbox hardware. With a sleek white color and made of durable plastic, this mailbox post is built to last and withstand all weather conditions. The cross-arm design allows for easy access to your mailbox and the rust-proof feature ensures your mailbox will stay rust-free for years to come. This mailbox post is manufactured in Gibraltar and comes in a package quantity of 1. It is compatible with all Gibraltar mailboxes and is a great replacement for any damaged or old mailbox hardware. Upgrade your mailbox and add this high-quality mailbox post to your collection today. ******SEE PICTURES. BRAND NEW IN BOX******