HP 4GB (1x4GB) Single Rank x4 PC3L-10600R (DDR3-1333) Registered CAS-9 Low Voltage Memory Kit New Same day shipping if purchased before 4PM CST, Monday through Friday One year end user warranty Please contact Core 4 Solutions for questions about expedited shipping, item condition, warranty etc. Core 4 Solutions has served over 18,900+ satisfied IT buyers.