BS1040 Features: 28 gauge porcelain steel Porcelain steel surface is laminated to 1/2'' thick MDF core Easily cleaned with liquid ammonia added cleaner and water Dual use as a magnetic bulletin board and writing surface Board surface ship with a protective poly film coating All boards 4' and longer are crated to help prevent damage during shipping Includes: Includes L-clips, rawl plugs and screws for installation Includes Full-length map rail and accessory tray. Color/Finish: Glass-hard, vitrified porcelain surface is colorfast and will not fade Warranty: 50-Year Best-Rite warranty