The new Presidential window box features a bowed front, raised panel design, pronounced crown molding detail and built-in overflow drains. Decorative brackets offer a beautiful finishing touch with a classic look (deck rail brackets sold separately). Sub-irrigation water system encourages root growth. Our molded plastic planters are made from high-grade polyethylene, double wall design and includes 2 steel wall mount brackets for the 24" length with a black powder coated finish. The 36" and 48" get three brackets, and the 60" get four brackets Inside dimensions are 7.5"W x 7.6"D, with the length of each window box reduced by 4.5". Soil capacity for the 24" is 2.5 gallons, and the 36", 48", and 60" have a max soil capacity of 3.5, 5 and 6.5 gallons respectively. 15-year limited warranty. For more information please call us toll free at 888-427-3362.