The Noctua NF-A4x10 PWM is a premium quiet fan designed for computer cases. With a 40x40x10mm size and a brown color, this fan features a sleek design and powerful airflow capability. It operates at a maximum fan speed of 3700 RPM, delivering a maximum airflow volume of 5 CFM. The fan is made of durable plastic material and utilizes a SS02 bearing type for smooth operation. Compatible with universal brands, this fan is a reliable choice for cooling systems requiring a 4-pin power connection and 12V voltage.