The Belimo FSTF120-S US Actuator is a smoke and fire damper actuator designed for HVAC systems. With a power source of 120V and a spring return mechanism, this actuator provides 18 inches of travel distance. It comes with a manufacturer warranty of none and is manufactured by Belimo, a trusted brand in the industry. The unit quantity is 6, making it ideal for multiple installations in commercial or industrial settings. This product is new and unused, ensuring reliable performance and durability for your HVAC system.