4GB STICK For HP-Compaq Pavilion Series dv6-2133eg dv6-2135sl dv6-2138ca dv6-2140eb dv6-2140ed dv6-2150eg dv6-2150es dv6-2150sb dv6-2150us dv6-2151ez dv6-2153el dv6-2154ev dv6-2155dx dv6-2157eo dv6-2157wm dv6-2160eb dv6-2160ep dv6-2160es dv6-2160ez dv6-2162ez dv6-2166ss dv6-2168es dv6-2170ep dv6-2170es dv6-2170sl dv6-2170us dv6-2171ee dv6-2171nr dv6-2171sl dv6-2173cl dv6-2174ca dv6-2175tx. SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. 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 HP-Compaq Pavilion Series. (See Compatibility List Below)