Amisco Trundle Metal Bed, Twin Size 39", Metallo/Mat Dark grey Mattress support compatible with foam or coil mattresses, no boxspring required. Built with 9 metal crossrails and high density fiberboard surface. When used with an Amisco metal twin size bed, the mattress of the trundle bed should not exceed 8" thickness. Sturdy fully welded metal structure for increased durability. Product made of superior North American steel, painted with lead free and environmentally safe baked powder coating for a scratch resistant finish. Easy to clean metal surface. Assembly required. Made in Canada. 10 year limited residential warranty. Mattress not included.