8GB KIT (2 x 4GB) For Sony Vaio VPC Series VPCCW1Z4E/B VPCCW21FD VPCCW21FX VPCCW21FX/B VPCCW21FX/L VPCCW21FX/P VPCCW21FX/R VPCCW21FX/W VPCCW22FX VPCCW23FD VPCCW23FX VPCCW23FX/B VPCCW23FX/R VPCCW25FB VPCCW25FG VPCCW25FG/P VPCCW25FL VPCCW25FN VPCCW26FA VPCCW26FG VPCCW26FG/B VPCCW26FG/L VPCCW26FG/P VPCCW26FG/R VPCCW26FG/W VPCCW26FX VPCCW26FX/B VPCCW27FX VPCCW290X (CTO) VPCCW29FX VPCCW29GS. SO-DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. 8GB KIT (2 x 4GB) SO-DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Sony Vaio VPC Series. (See Compatibility List Below)