HP 507750-B21 HP 500GB 3G SATA 7.2K 2.5IN MDL HDD<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Please ensure that your original part number matches this exactly， or check with the manufactuer for compatiblity. Customers are responsible for compatiblity.</li><li>This part is guaranteed to be fully functional， original and authentic.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ZHWT9LLYL.jpg" noproxy>