Our porch post selection includes this plain square post. It works well with our square balusters. The square porch post is designed for use with the 5" balustrade system. It anchors lengths of balustrade and gives the balustrade structural support. The square porch post features a durable urethane construction. High-density urethane is lighter in weight than wood and moisture-resistant. It prevents the high levels of moisture absorption that can lead to peeling, cracking and decay. The square porch post is crafted with precision and reinforced at the core. It is also pre-primed.