Brand: Seagate Series: Barracuda 7200.12 Model: ST3320418AS Capacity: 320 GB Application: Desktop Style: HDD internal Form Factor: 3.5 Interface: SATA II Speed: 7200 rpm Cache: 16MB Average Seek Time: 8.5 ms Condition: Brand New Dimensions ( WxDxH) : 10.2 cm x 14.7 cm x 2 cm Weight: 0.838 lb ( 380g) Warranty: 90 day Our advantage: 1) Competitive price, best service. 2) Strong packaging to protect the hard drives best in shipment. 3) Large quantity in stock to ship quickly. We also stock refurbished Hdds, which are very clean, tested working 100% and in excellent condition. You could almost sell them as new. We guarantee that it will work 100% upon receipt. We have various capacities for you to choose, brand new and refurbished: 3.5 IDE and SATA for desktop: 40G/ 80G/ 160G/ 250G/ 320G/ 500G/ 750G/ 1TB/ 1.5TB/ 2TB 2.5 IDE and SATA for laptop: 10G/ 20G/ 30G/ 40G/ 60G/ 80G/ 120G/ 160G/ 250G/ 320G/ 500G Please feel free to contact us with any questions or concerns. We will reply you ASAP.