Presidential 36 Inch Window Box - Black 15-year limited warranty. 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 with a black powder coated finish. Inside dimensions are 31.5"L x 8"W x 7.5"D, outer dimensions 36" x 11.5" x 10", holds approx. 3.5 gallons of soil. ***USUALLY SHIPS IN 6-10 BUSINESS DAYS