This is a San Ace 60 Case Fan 9G0612P1M031 U1295 USFF from a Dell Optiplex SX280 but also used in the Dell Optiplex GX620, GX745, and GX755 Ultra Small Form Factor (USFF) computers. It may also be right for other models but I can't vouch for that so please make sure that you research to make sure this is the right part for your needs. If you have any questions feel free to eBay message me and I will try to help you in any way I can.