PTEE-P series ABS Inline Duct Blowers have high airflow performance and include two-layer sound absorbent cotton and sound wave holes to reduce noise. Each backward-curved centrifugal impeller is made of PA66(FR) material and the external housing and connection box are made of ABS(FR). The fans can operate from -20℃ to 60℃ and include thermal protection and dual ball bearings for long-life operation up to 50,000 hours. The external rotor motor has a low temperature rise and is equipped with automatic reset thermal overload protection. Insulation Class:F. Protection Class:IP67.