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 Packaging: The Rockport Double Mail Post ships in 2 boxes (standard post MP5802 / 2x paper holder arms MP5811) 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 - Our products are proudly designed in Canada and are made in the USA Outside Dimensions: 18.3in L x 22.8in W x 56.5in H (46.4cm x 57.8cm x 143.5cm); Paper Holder Inset Dimensions: 10.5in W x 3.5in H (26.6cm x 8.8cm); Paper Holder Inside Dimensions: 12in L x 5.5in W x 4.5in H (30.5cm x 14cm x 11.4cm)