Western Digital WD2500KS Caviar SE16 250GB 3.5" 7200 RPM 16MB Cache SATA2 3.0 Gb/s HDD Hard Disk Drive WD2500KS-00MJB0.Model Number: WD2500KSWD Part Number: WD2500KS-00MJB0Specifications:Form Factor: 3.5"Interface: SATA2 3.0 Gb/sCapacity: 250GBCache: 16MBRPM: 7200 RPM