Detailed Description Part number: 408855-B21 Specification: HP 16GB Reg PC2-5300 2x8GB Kit Memory Kit DDR3 Memory for HP proliant Server 1GB 500668-b21 HP 1GB 1Rx8 PC3-10600E-9 Kit1GB 2GB 500670-b21 HP 2GB 2Rx8 PC3-10600E-9 Kit 500656-b21 HP 2GB 2Rx8 PC3-10600R-9 Kit 2GB 3GB 500672-B21 HP 4GB ECC PC3-10600 1333 MHz 240 pin DDR3 500660-b21 HP 4GB 4Rx8 PC3-8500R-7 LP Kit 500658-b21 HP 4GB 2Rx4 PC3-10600R-9 Kit 4GB 4GB 500662-b21 HP 8GB 2Rx4 PC3-10600R-9 Kit 516423-b21 HP 8GB 2Rx4 PC3-8500R-7 Kit8GB Part number of other items as belows: 1GB 376638-B21 343055-B21 408850-B21 397409-B21 432804-B21 500668-b 21 2GB 376639-B21 343056-B21 408851-B21 397411-B21 432806-B21 500656-b21 50 0670-b21 4GB 343057-B21 379300-B21 397413-B21 408853-B21 375004-B21 500658- b21 500660-b21 500672-B21 8GB 348106-B21 397415-B21 408854-B21 516423-b21 5 00662-b21 16GB 413015-B21 408855-B21 3 years warranty.all brand new packed in retail box pls feel free to connect us if any help Angela from honsungtech