CVi Torr Master TM 250 Cryopump Model CGR 511, S/N 6D-004-00040, P/N 37-2550-00040.  11-34" ID x 16" OD Flange.  Item has been in storage a few years and is still in the original box, but may need new O-rings and a little polishing.  Approximately 150 lbs.