blades for lawn mowers mowers mowers murray for models 40501x30 a , 40530x92 a , 40541x30 a , 40541x30 a , 40715x99 model - technical specifications length 518 mm centre hole 21.5 mm external hole - mm centre hole spacing - mm CODE: 13270333 ORIGINAL CODE 91871E701 , 91871HT SR