Features: Brand new and high quality The damper is suitable for controlling the air volume from full flow to shut-off Made of plastic and equipped with a plastic tube Can work with a thermostat to automatically turn on and off High air tightness, up to 98%, with good adjustment performance Valve body and blades made of new materials, odorless, pollution-free, wear-resistant, corrosion-resistant, and easy to disassemble Specifications: Material: PVC Weight: 538g Size: As shown in the picture Interface: DN75/DN110/DN160 Voltage: DC12V/220V/AC24V/DC24V Note: 1. Please allow 1-2cm errors due to manual measurement; ensure you are comfortable with this before ordering 2. Due to differences between monitors, the picture may not reflect the actual color of the item Package includes: 1 x Motorized Damper