4GB KIT (2 x 2GB) For IBM-Lenovo IdeaCentre Series B510 (7712-xxx) H410 K220 (5358-1BU) K220 (5358-4BU) K220 (5358-xxx) K300 K300 (5316-1AU) K300 (5316-1BU) K300 (5316-1CU) K300 (5316-1EU) K300 (5316-1GU) K300 (5316-2AU) K300 (5316-2CU) K305 (5316-xxx) K320 (3019-2OU/2PU) K320 (5316-xxx). DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) 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 IBM-Lenovo IdeaCentre Series. (See Compatibility List Below)