4GB KIT (2 x 2GB) For Dell Inspiron 13 (1318) 1320 14 (1420) 14 (1440) (1427) 15 15 (1520) 15 (1521) 15 (1525) 15 (1526) 17 (1720) 17 (1721). SO-DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) SO-DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Inspiron. (See Compatibility List Below)