Eathtek Replacement CPU Cooling Fan for HP EliteBook 2740 2740p series, Compatible with part# KSB0405HB 597840-001(Note:The part# may be different) Compatible Model Numbers: HP EliteBook 2740 2740p 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.