
Air Conditioning Ventilation Round Manual Volume Control Damper. High-Quality Materials: Constructed with 0.6mm GI sheet and 0.3mm aluminum blades for durability. Precise Airflow Control: Manual volume control damper designed to break supply and return air flow. Standard Size Options: Available in standard neck sizes: 100mm, 125mm, 150mm, 160mm, 200mm, 250mm, 315mm. Flexible Customization: Offers flexible customization options to meet specific project requirements. 100% Quality Inspection: Every product undergoes visual and function inspection before packing. Free Sample Availability: Samples are freely provided for customer evaluation and testing. Fast Lead Time: Off-season lead time within 15 workdays; peak season one month. Multiple Payment Terms: Accepts LC, D/P, T/T, PayPal, Western Union, and small-amount payments.