Eathtek Replacement 40mm CPU Cooling Fan for Acer Aspire S7 S7-391 series, Compatible with part numbers 23.M3EN1.001 K126000260F Compatible Model Numbers: Acer Aspire S7 S7-391 23.M3EN1.001 K126000260F (40mm) Replacement and high quality,Replace your faulty, cracked or broken fan Each fan is tested before shipping All pictures are taken from the real item, please check carefully before bidding. Notes: The fans are produced by Forcecon,ADDA,Sunon,Kipo or any other manufacturers,you may receive any depending on the stocks.