Durable Mail Posts: We use 100% high-grade Polyethylene resin in the manufacturing process - making our products durable, lightweight and highly shock resistant Four Season Use: These posts are resistant to high impact, chemicals and extreme weather conditions - this product stands true to its 'four-season use' tag with very little winter preparation Long Lasting Quality: The resin used to create our products contains built-in UV inhibitors that reduce the damaging effects of the sun - this ensures that your product doesn't fade, preserves its color and increases its overall lifespan Easy to Use: This New England inspired mail post perfectly captures the timeless charm of the East Coast - easily installs over a standard 4×4 wood post Compatibility: Best suited for medium or large mailboxes weighing less than 16lbs, minimum 7 inch width Packaging: The Liberty Mail Post ships in 2 boxes (liberty post MP5806 / arm MP5807) and includes the necessary hardware pack and instructions - 4×4 wood post, mailbox, and mailbox mounting hardware NOT INCLUDED The Mayne Advantage: Mayne offers a 15-year residential warranty or a 5-year commercial warranty on this mail post - Mayne has been the top choice by the home and gardening sector in North America for over a decade