PTA series Axial Inline Duct Fans have high airflow performance and include an innovative aluminum structure for low noise and long-term reliability. Each housing is made of high-endurance metal and the axial fans include an aluminum housing with sizes in 120x120x38mm or 172x150x51mm. The fans can operate from -20℃ to 70℃ and also include thermal protection and can be configured with sleeve or dual ball bearings for long-life operation up to 50,000 hours. Insulation Class:F. Protection Class:IP44.