Samsung / Lenovo 16GB PC4-19200 DDR4-2400MHz ECC Registered CL17 288-Pin DIMM 1.2V Dual Rank Memory Module (M393A2G40EB1-CRC0Q // 46W0831). This is a seller refurbished part in great working condition. May show signs of cosmetic wear but this should not interfere with the effectiveness of the product. There are two part numbers associated with this piece, both of which are shown on the listing images.