The X4215 16 Inch Motorized Damper is a high-quality HVAC accessory designed for spring opening and power closing functions. Tested  LENNOX, this damper ensures efficient and reliable operation in HVAC systems. With a diameter of 16 inches and a unit quantity of 1, this model (X2415) is a durable and effective solution for controlling air flow in commercial and industrial settings. 24VAC power. Adjustable stop.