This lot of Seagate/Dell 1TB 7.2K 2.5" 15mm SAS HDDs is perfect for those who need reliable and high-performance storage for their desktop or laptop. These internal desktop drives are compatible with both PC and Mac and have a read speed of 7200RPM. With a transfer rate of 6GB/s, you can expect fast and efficient data transfer. These drives are hot-swappable and removable, making them easy to install and replace. They come in a form factor of 2.5 inches and have a storage capacity of 1TB. The product line is Constellation.2 and the model number is ST91000640SS. The interface is SATA and the drive type supported is HDD. The lot comes with 4 units of these drives and they are all in excellent working condition.