Used working Rainin Dynamax HPLC system: two HPLC pumps model Rainin Dynamax SD-200 with 10 WSS pumps heads, DAD (diode array detector) model PDA-1, two Rheodyne injectors model 7725i with 1 ml and 20ul loops, some tubins/valves as pictured plus computer with software (Windows 98, the program is Dynamax PC Chromatography Data system software version 1.9), manual for pumps. . 115v. If not satisfied, You can return this unit withing 10 calendar days for a full refund minus shipping lot Ulstfront