THE MAJOR OD OF THIS FILTER IS 4.19". IF YOUR OLD PART HAD A 3.94" OR 4.0" OD ORDER PART #50-2.0-100 FROM "FLOW EZY FILTERS"..PHONE # 313-665-8777. SOME OLD DROTT MACHINE APPLICATIONS USED OLD SUBBED OUT FILTERS THAT HAD THESE SMALLER MAJOR DIAMETERS. THE HYD OIL RESERVOIR HOLES ON THESE MACHINES WERE VERY CLOSE IN SIZE TO THE OD SIZE OF THEOLD FILTERS. THE NEW SUBBED TO FILTER 196955A1 MAY NOT FIT INTO THESE RESERVOIRS AND YOU WILL HAVE TO ORDER THE #50-2.0-100 FROM
