【LONGWELL Cross-Flow Fans】 Smooth operation, low noise   Significant energy saving, reduced operating costs   High airflow and uniform air supply   Compact structure, flexible installation   High dynamic pressure coefficient, long air supply distance   Customization: Available in various sizes (diameter 30mm to 90mm, length customizable up to 800mm) and motor types (AC, DC, BLDC, EC), with OEM/ODM customization services to meet your specific needs.