The product is a set of 5 CPU cooling fans and heatsinks designed specifically for Dell OptiPlex 390, 790, and 990 computers. The fans have the models 637NC, 0J50GH, and 0637NC, ensuring compatibility with the specified Dell brand. These components are essential for maintaining optimal temperature levels in the computer to enhance performance and prevent overheating. Ideal for those looking to replace or upgrade their existing cooling system in their Dell desktop computers.