\n UD138 DDR4 UDIMM 2666 M Hz\n High speed Energy efficient: saves 20% power compared to DDR3 High-quality PCB provides enhanced signal transfer & system stability 133.35 x 31.25 x 1.40mm Weight: 18g Lifetime warranty \n High Quality AGI used the most trusted flash memory to produce our high quality, efficiency, & stability products.\n\n\n\n\n\n\n\n