The AVC BAZA1022R2U P001 CPU Fan is a high-quality cooling solution designed specifically for Lenovo AIO desktops, including models like 520-24ICB and 520-24ARR. This fan is black in color and utilizes a hydraulic bearing for efficient operation. Made of durable aluminum material, it has a 4-pin power connection and operates at a voltage of 12V. Ideal for keeping your CPU cool and running smoothly, this OEM unit is a reliable choice for your computer cooling needs.