Lawn mower blade compatible TORO Models Grandstand 60" , G 3 , Z 500 , Z 528 , Z 550 , Z 553 , Z 555 , Z 557 , Z 558 , Z 560 , Z 580 , Z 587 , Z 588 , Z 590 Features: Length (mm): 520 Centre hole (mm): 15.8 Outer hole (mm): - Centre/centre distance (mm): - Weight: 1.2 kg Code: 13271392 Reference code: 105-7718-03 , 105-7718 TORO SR m