The Mayne Nantucket Window Box Collection features a bowed front, raised panel design, pronounced crown molding detail and built-in overflow drains. This window box features a double-wall design creating a water reservoir. Mayne molded polyethylene window boxes are made from 100% high-grade polyethylene. This window box includes 3 steel wall mount brackets with a black powder-coated finish. Outside Dimensions: 36″L x 11.5″W x 10″H. Inside Dimensions: 31.5″L x 7.5″W x 7.6″D. It holds approximately 2.5 gallons of water and 3.5 gallons of soil. Optional decorative brackets add a beautiful finishing touch, sold separately. The weather-proof and ultra-tough construction allows you to enjoy your window box all year long with very little winter preparation. The UV inhibitors within the resin allows for a long-lasting fade-free performance. 15 year warranty – residential application, 5 year warranty – commercial application. For further questions please contact Mayne Inc. at 1-866-363-8834. Made in the USA.