42" FLAT mower blades 102 105 115 125 135 D100 105 110 120 SST15 Z225 LA105 110 115 125 135 X110 120 125 145 A : 544 mm B: STELL. 7P C: D: A: length in mm B: centre hole C: side holes D: centre distance JOHN DEERE Part No.: 017143 Original part No.: GX22151 GY20850 AM137328 AT