The Silverstone AS140B Air Slimmer 140mm fan is a high-quality case fan designed for optimal airflow and cooling in computer systems. With a fan diameter of 140mm and a slim design of 15.5mm, it offers efficient and effective cooling performance. The 4-pin PWM power connection allows for precise control of fan speed, while the ball bearing design ensures durability and reliability. Operating at a voltage of 12V, this Silverstone fan is a reliable and essential component for maintaining optimal system temperature and performance.