The Ares I igniter was an advanced version of the flight-proven igniter used on the Space Shuttle's solid rocket boosters. It was approximately 18 inches (46 cm) in diameter and 36 inches (91 cm) long, and took advantage of upgraded insulation materials that had improved thermal properties to protect the igniter's case from the burning solid propellant. NASA successfully completed test firing of the igniter for the Ares I engines on March 10, 2009 at ATK Launch Systems test facilities near Promontory, Utah. The igniter test generated a flame 200 feet (60 meters) in length, and preliminary data showed the igniter performed as planned.