Seagate K HDAtl10KIII 73GBU320 68pin10 20pkbulk, 73 GB, 10000 RPM, 8 MB, 3.5", Ultra-ATA/133 Seagate K HDAtl10KIII 73GBU320 68pin10 20pkbulk. HDD capacity: 73 GB, HDD speed: 10000 RPM, Storage drive buffer size: 8 MB, HDD size: 3.5", Interface: Ultra-ATA/133