6″ x 6″ Galvanized steel deck posts Made in USA by New Castle Steel backed by a 25 year warranty. If you plan to create a new outdoor space, it's important to have a reliable support system to withstand the elements and pests. With New Castle Steel framing, you can trust that your deck will remain sturdy and supportive for years. Unlike pressure-treated lumber framing, this system won't warp, rot, rust, or shift, providing peace of mind and a durable structure.