The Vetroo SG-120 PC Case Fan is a set of 5 dual ring RED LED fans designed for low noise and efficient cooling. Each fan has a diameter of 120mm and features 7 blades for optimal airflow. Made of durable plastic, these case fans are compatible with universal brands and are manufactured in China. With their vibrant red light color and high-quality construction, these fans are a great addition to any computer setup looking for both style and performance.