A. Features: - The air damper is of good quality. - This air damper is suitable for controlling the air volume and can be adjusted from full flow to the closed state. - The air damper is made of plastic and is equipped with a plastic pipe. - It can be used in conjunction with a thermostat to achieve automatic opening and closing. - It has relatively good air - tightness, with a sealing degree of up to 98%, and decent adjustment performance. - The valve body and blades are made of new materials, which are odor - free, pollution - free, wear - resistant and corrosion - resistant, and easy to disassemble. B. Specification parameters: - Material: PVC - Weight: 538 grams - Dimensions: As shown in the figure - Interface: DN75/DN110/DN160 - Voltage: DC 12V/220V/AC 24V/DC 24V C. Precautions: - Since it is a manual measurement, an error of 1 - 2 centimeters may occur. Please make sure you don't mind this before placing an order. - Due to differences between different monitors, the pictures may not fully reflect the actual color of the item. D. Package contents: - 1 electric air damper