The square column, a timeless style is now available in expanded cellular PVC for quick, easy assembly and virtually maintenance-free! Classic Craftsman Series Columns are not prone to the same environmental damage as real wood, such as splitting or cracking. Their E-Z Lock joints will not separate due to disproportionate changes in panel dimensions. When two coats of acrylic latex paint are applied, Classic Craftsman Series Columns will deliver years of service as promised by their Limited Lifetime Warranty against rot, corrosion, and moisture damage. Base: 15 5/8" Outside Width Cap: 11 5/8" Outside Width Bottom Shaft: 10 3/8" Inside Width Top Shaft: 6 3/8" Inside Width • Made from expanded cellular PVC• Ready for your prime and paint• Virtually maintenance-free performance• E-Z lock joint design makes installation a breeze• Assembles around a structural support• Comes with lifetime limited warranty• Standard Capital & Standard Base, Plan Type E - Unsplit/Whole