"GAGE,CONTOUR,FLANGE;USED TO INDICATE THE ALLOWABLE AREA FOR REMOVAL OF MATERIAL FROM END FLANGE OF P/N 2497346 OUTPUT COUPLING ASSY DURING BALANCING OPERATION WHEN OVERHAULING PTO SHAFT,ITEM LOCATES ON FLANGE TO EXPOSE ONLY THE AREA ALLOWED FOR MATERIAL REMOVAL;MEASURES 2 IN. LONG,3 5/8 IN. DIA.,MATL. CRES,WEIGHS APPROX. 1 LB 2 OZ"