Check the listing for details. SOLAR GROUP Mailbox Post Mount Black Plastic Gentry Classic GGC1B00AM. Condition: New. Listed at 105.99 USD. The Gentry all-in-one mailbox and post combo features a multitude of benefits that will exceed your demands. Constructed from virtually indestructible and rust-proof double-walled polycarbonate plastic, the mailbox and post combination is also treated with an ultra-violet inhibitor finish to resist color damage from the sun. With its large capacity and convenient open compartment below, the Gentry accommodates plenty of mail, magazines, padded envelopes and parcels. It also features a back door to retrieve mail without entering the street, making it ideal for high-traffic areas. The Gentry installs over an existing 4x4 post for a quick and easy set up and features a five-year limited warranty for your piece of mind.