Mayne Nantucket Window Box 3FT Black! -Brand new -This window box features a double-wall design creating a water reservoir. -Mayne molded polyethylene planters are made from 100% high-grade polyethylene. -Includes 3 steel wall mount brackets with a black powder coated finish -Outside Dimensions: 36"L x 10"W x 11.5"H. Inside -Dimensions: 31.5"L x 8"W x 7.5"D, holds approx. 3.5 gallons of soil. -Water reservoir capacity is approximately 2.5 gallons (9 Liters) -Optional decorative brackets add a beautiful finishing touch, sold separately (model # 4828-B) -The weather-proof and ultra-tough construction allow you to enjoy your window box all year long with very little winter preparation. The UV inhibitors within the resin allow for a long-lasting fade-free performance.