ORIGINAL MTD lawnmower mower blade holder hub complete with flange, shaft and pulley COMPATIBLE WITH BEARINGS COMPATIBLE TO DIFFERENT BRANDS: MURRAY ECHO ERING HERKULES ISEKI Height to upper edge: 51 mm Height to lower edge: 16 mm Diameter: 154 mm CODE: 22-163 100030 ORIGINAL CODE: MURRAY 20551 - 24384 - 492574 - 492574MA - 90905 - 92574 ECHO 21-4KC-A115 ERING M90905 HERKULES ISEKI 4KC-A115 SM