5X Air Damping Valve Ac220V Electric Duct Electric Damper Actuator for Ventilation Valves with Signal Feedback,5 x Damper actuator,Red & black

Damper driver Air volume control valve Signal feedback actuator Control air volume Damper actuatorYou may also like , E712LS, Manual Air Control Valve, 4-Way, 1/4in NPT$$Plumbing & HVAC.