The Westchester Arbor is a beautiful, substantial looking arbor that boasts 5 In. posts. The classic arch top design offers traditional and timeless appeal. Made of premium weather-resistant vinyl, this arbor is virtually maintenance free. Never stain, paint, or maintain your arbor again. Vinyl offers the classic look of wood without the headaches. Just the occasional rinse with a garden hose is all you need to do to keep your arbor looking great year after year. This product comes with a 20 year warranty against yellowing, warping and cracking. Wood will rot away, and wrought iron will rust and burn plants when the sun shines down on the black metal. Vinyl is strong and durable, so you can cultivate plant growth on your arbor without having to worry about rotting, painting, or burnt plants. Only a drill and level required for assembly. For installation, extend the posts with pressure treated lumber inserts (not included).