MAGNETIC CLUTCH FOR LAWN TRACTOR TAG LIAER LAWN MOWER MTD FMZ50 , RTZ50 , TRZ 54 AND Z-FORCE S SERIES MODEL - SPECIFICATIONS SHAFT DIAMETER 25. 4 mm HEIGHT 94 mm PULLEY DIAMETER 150 mm TRAPEZOID BELT WIDTH 12.7 or 15.9 mm CODE: 25271575 ORIGINAL CODE 717-04552 , 717-04552A, 917-04552 , 917-04552A SR