Attention: The four main fan original factory for: 1.DELTA 2.SUNON 3.FORCECON 4.ADDA So maybe we will send by random,hope you can understand,thank you. Features: Fan is Brand new Compatiblemodelswith : For Lenovo IdeaPad 15 V15 14api S145 S145-14IWL 340C-15IWL FS540 S145-15IWL 5F10S13876 /S145-15 Part Number For: FCN DFS5M32506331P FLAW DC28000DXF0 NS85B21. Please Leave a meage to tell me which manufacturer you need If neceary,Or we will ship the goods in random,please understand.Thank you. Fan'sFunction: 1.It protects your valuable data by keeping your CPU cool 2. The CPU fan features efficient heat diipation and low noise 3. You can work as long as you like without overheating your computer 4. Keep your computer cool and comfortable on your lap or at your desk with this CPU fan 5. Made of high-quality material, it is durable in use 6. Perfect design for high compatibility and excellent compose How to maintain CPU fan 1.Do not put a computer in dusty places 2.regular cleaning of dust and lubricants, every six months or every year, it is recommended to bring anti-static gloves Note: 1.Please allow 1-3mm error due to manual measurement.Please make sure you do not mind before you bid. 2. Lighting,display and other factors may cause COLOR SHADING,please comprehensive pictures and text descriptions to determine!