Our selection of 5" balustrade components includes a diverse selection of products designed to conform to and accentuate virtually any exterior space. This top rail measures 12' in length. It includes a versatile contoured surface designed to work with any baluster style within the system. When you require more character than the standard railing has to offer, consider the 5" system. The top rail is molded in urethane, a rigid material with the non-porous qualities of a modern polymer and the ability to conform to traditional design modes. Urethane rails remain free of the splintering, rotting and insects often associated with wood, and they are reinforced with heavy-duty vinyl tubing.