"DETERMINES QUALITY OF BEARING WORKING SURFACES; C/O METER,CATHODE-RAY TUBE,& SPEAKER DISPLAY INDICATOR UNIT,3 ADJUSTABLE CHUCKS ACCOMODATE BEARINGS RANGING FROM 0.090 TO 9.250 IN.BORE DIA,FIXED-STEP ARBORS,RING WEIGHTS,DRIVE WHEEL CONTROL UNIT FOR DRIVING & VARYING BEARING ROTATION SPEEDS; BEARING LOADING BOTH VERT & HORIZ POSITIONS; 30.500 IN.LG,29.000 IN.W,27.000 IN.H; POWER 115 OR 230 VAC,60 HZ"