LAMBDA Regulated Power Supply. It is model LXS-C-5-OV-R. It is in great used condition, The specs on the front are: Model - LXS-C-5-OV-R Input 105-132 V 57-63 Hz Max ratings 9.0A @ 40c, 8.0A @ 50c, 6.8A @ 60c, 5.3A @ 71c LAMBDA regulated power supply LAMBDA Electronis Corp Melville, LI., NY Veeco Subsidiary The unit measures 9-1/4" long by 4-7/8" wide by 3-1/4" tall. This measurement does not include the parts sticking out of the back, they will add about another 1/2" to the length. The unit has some scratches in the gray paint - they will not affect the way the unit works. We will guarantee the unit to work for you as it should.