"BENCH TOP ROUNDNESS-MEASUREMENT SYSTEM, MEASURES CYLINDRICAL PARTS UP TO 20 INCH DIAMETER AND UP TO 100LBS, BASE IS 16IN X 20IN GRANITE WITH BUILT IN SPINDLE; ADJUSTABLE CENTERING; TILT TABLES AND GEAR DRIVEN MOTOR,CLOCKWISE AND COUNTER-CLOCKWISE ROTATION AT 1;2; OR 4 RPM; CAPABLE OF OPERATING USING 120-VOLT, 60 HZ"