504338-001 – HP 320GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive Brand : HP Weight : 320 GB Cache Storage : 16 MB Maximum Data Transfer Rate : 3Gb/s Drive Type : Internal Drive Width : 3.5″;Drive Interface=SATA” Interface Standard : SATA/300 Assembly Required : Yes Eco Friendly : Yes