Traditional computer fans are made to expel air, so for years, airflow was the most important rating that determines cooling efficiency as most fans are used as exhausts. However, with positive pressure gaining importance in computer cooling technology, SilverStone created Air Penetrator fan specifically designed for intake fan applications, where airflow rating is not a priority. The design goal for Air Penetrator is to focus airflow into a column that can be channeled through various obstacles inside the modern computer case for more efficient cooling performance.Specification:- Manufacturer: Silverstone Tech - Fan Diameter: 180mm - Fan Depth: 25 mm - Fan Speed: 700-1200 rpm - Airflow: 80-130 CFM - Sound Level: 18-34 dB