4ft opening, peak height 92". Heavy Structural 4" arch profiles & 5" square posts for 4 ft opening. Heavy Structural 5" arch profiles & 5" square posts for 5 ft opening.. Easy and fast to assemble. Fewer pieces than retail models. Arbor arches are in 1 pc. Contractors and DIY favorite! Imagine your newly installed arbor, its woven shadow shrinking under a summer's rising sun. With Elegance Vinyl Arbors, those visions are made a reality. Arbors designed by Elegance Vinyl Products are made with high quality PVC for long term durability. Arbor options with trim or without trim depending upon your preference.