Features: Actuator + air valve: The electric air valve consists of two components: the actuator and the air valve. The actuator features compact size, high torque, and long service life. It supports bidirectional control and can be selected based on different requirements. High-quality valve blade: The air valve blade is made from high-quality aluminum plate with stamping molding, equipped with a silicone sealing ring for excellent airtightness, wear resistance, and corrosion resistance, ensuring stable and reliable performance. Mirror finish: The round air valve uses a high-quality motor for smooth and reliable operation with low failure rate. The valve body is constructed with a mirror-like finish, offering corrosion resistance and a premium appearance. Compatible with temperature controller: Can be used with various thermostats and automatic switches to effectively control the environment, providing energy efficiency, comfort, and quiet operation. HVAC Air Duct Valve / Electric Air Duct Damper / Motorized Damper 125MM 220V Both opening and closing functions require power; the actuator automatically shuts off after completing an operation. Operation time per cycle is approximately 10 seconds. This damper is suitable for controlling airflow from full flow to complete shut-off. Constructed with polished stainless steel and includes an aluminum valve plate. Can be integrated with a thermostat for automatic open/close functionality. Color: Silver Material: Stainless steel Size: Height: 19mm Outside diameter: 125mm Package Contents: 1 x Electric air valve Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3cm.