Simultaneous with closing of the purchase and sale agreement, MannKind entered into a 20-year lease agreement with the purchaser, with multiple renewal options available. The real property sale includes 263,900 square feet of manufacturing space at 1 Casper Street in Danbury, Conn. (commonly known as Building 1), but does not include MannKind's research and development facility (commonly known as Building 8). MannKind will continue to be the sole operator of the entire Connecticut facility. This location is where MannKind produces Afrezza® (insulin human) Inhalation Powder, the company's first FDA-approved product and the only inhaled ultra rapid-acting mealtime insulin in the United States. It is also where MannKind manufactures Tyvaso DPI™ (inhaled treprostinil) under its collaboration with United Therapeutics.