4GB STICK For Sony Vaio VPC Series VPCEB2TFX/P VPCEB2TFX/W VPCEB2TGX VPCEB2TGX/BI VPCEB2UFX VPCEB2VFX VPCEB2VFX/BI VPCEB2YFX VPCEB2YFX/BI VPCEB2Z0E VPCEB2Z0E/BQ VPCEB31FD VPCEB31FG VPCEB31FGPI VPCEB31FX VPCEB32EN VPCEB32FM VPCEB33FD VPCEB33FM/BJ VPCEB33FX VPCEB34EN VPCEB35FG VPCEB35FG/P VPCEB35FX VPCEB36FA VPCEB36FF VPCEB36FG VPCEB36FGL VPCEB36GM VPCEB36GM/BJ VPCEB36GX VPCEB37FD. SO-DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. 4GB STICK 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)