Manufactured at an ISO9002 registered facility using returned, original equipment cartridges. They are Class II level cartridges which means that each unit has been re-charged with both toner and a new drum to ensure top quality output and consistent reliability. They are then tested for quality assurance. Contains a minimum of 55% post-consumer recycled material. Our cartridges can be recycled again and again. Your satisfaction is 100% guaranteed and you can typically save over 20%Black.OEM# 64015HA.High yield.Lexmark T640, T640DN, T640DTN, T640N, T640TN, T642, T642DTN, T642N, T642TN, T644, T644DTN, T644N, T644TN, X642E, X644E, X646E, X646DTE, X646EF.Yields 21,000 pages.Contains a minimum of 87% post-consumer recycled material.