It's big (140mm), brown (Noctua), programmable (PWM), and relatively slim (25mm)!The Noctua NF-A14x25 G2 PWM 140mm PC Fan is a premium-quality, quiet case fan designed for high airflow volume. With a magnetic bearing type, this brown fan operates at a maximum speed of 1500 RPM and is compatible with universal brands. The fan features a brown light color and is made of plastic material, making it a reliable choice for cooling computer systems while maintaining a low noise level,with its 140mm diameter and 4-pin power connection.