Seagate Desktop HDD Barracuda 7200.10 400GB Serial ATA II 7200RPM 16MB 20pk bulk, 400 GB, 7200 RPM, 16 MB, 3.5", Serial ATA II Seagate Desktop HDD Barracuda 7200.10 400GB Serial ATA II 7200RPM 16MB 20pk bulk. HDD capacity: 400 GB, HDD speed: 7200 RPM, Storage drive buffer size: 16 MB, HDD size: 3.5", Interface: Serial ATA II