4GB STICK For Dell Inspiron 15 M5030 15 M5040 15 N5020 15 N5030 15 N5040 15 N5050 15R 7520 15R N5010 15R N5010/M5010 15R N5110 15z Ultrabook 5523 SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory 4GB STICK SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Inspiron. (See Compatibility List Below)