For Sale: Dell Inspiron 15-3521 15.6″ Genuine Laptop CPU Fan with Heatsink 74X7K 7H5H9 Condition: Genuine part, Very Good condition. Stock picture. Description: The CPU Fan with Heatsink was tested and carefully removed from the working laptop. Shipping: USA Shipping will be arranged within 1 business days. We will ship overseas only via eBay Global Shipping Program.