Durable Mail Posts: We use 100% high-grade Polyethylene resin in the manufacturing process, which makes our products durable, lightweight and highly shock resistant. - Four Season Use: These posts are used for outdoor applications year-round, as they 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. - Compatibility: Small mailbox recommended. Best suited for lightweight mailboxes weighing less than 7lbs. Top inset panel on the post measures 1.9in W x 25.5in H. - Packaging: The Westbrook Plus Mail Post ships in 2 boxes (standard post MP5802 / arm plus & planter MP5830). It includes the necessary hardware pack and instructions. Note: 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. - Made in the USA: Our products are proudly designed in Canada and are made in the USA.