@catherinesun16: One-stop supply for your HVAC damper needs! Volume control dampers, fire dampers, smoke exhaust dampers – manual or motorized. Durable construction, corrosion-resistant, custom sizes. We export to Vietnam, Indonesia, Malaysia and many other global markets. Factory direct competitive pricing. Contact us via PM for your project quote! #HVACExport #VietnamHVAC #IndonesiaHVAC #MalaysiaConstruction #FireDamper