4GB KIT (2 x 2GB) For Sony Vaio VGN Series VGN-NS210W VGN-NS21E/S VGN-NS21ER/S VGN-NS21M VGN-NS21M/P VGN-NS21M/S VGN-NS220J/L VGN-NS220J/P VGN-NS220J/S VGN-NS220J/W VGN-NS220TH VGN-NS230DP VGN-NS230DW VGN-NS230E VGN-NS230E/L VGN-NS230E/P VGN-NS230E/S VGN-NS230E/W VGN-NS235J VGN-NS235J/L VGN-NS235J/P VGN-NS235J/S VGN-NS235J/W VGN-NS240E VGN-NS31EH/S VGN-NW215T VGN-SR11M VGN-SZ57SN/C. 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 Sony Vaio VGN Series. (See Compatibility List Below)