4GB STICK Dell Latitude 3300 3330 5420 5520 6430u E5420 E5430 E5520 E5530 E6220 E6230 E6320 E6330 E6420 E6420 ATG E6430 E6430 ATG E6430s E6520 E6530 E6540 SO-DIMM DDR3 PC3-12800 1600MHz RAM Memory<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>4GB STICK SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory</li><li>Genuine A-Tech Memory</li><li>Lifetime Warranty</li><li>Toll Free Technical Support 1-866-557-4527</li><li>Designed For Dell Latitude. (See Compatibility List Below)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51R6mFXej8L.jpg" noproxy>