The 12" Balustrade System's Bottom Rail, our most prominent rail, features an elegantly detailed form that defines balustrades with the robust and stately styling that you seek. When installed with 12" system components, the rail offers superior strength and stability. The 12" Balustrade System's Bottom Rail is 12' in length. It is precision molded in polyurethane, a high-density polymer material with the classic appeal of wood and an excellent resistant against moisture. The closed cell nature of polyurethane locks out moisture and does not attract insets. This bottom rail is also reinforced at the core with two heavy-duty vinyl pipes. It is pre-primed and ready for installation.