Genuine Cobra Part No: 26300167101, 

For Hecht Lawn Mowers: 553 AL, 554 AL, 553AL, 554AL, DYM1588S,

1 x Brand New Genuine Steel Blade Holder Boss Hub, 

( This is the part that the impeller sits on top of and the blade mounts to the base of this ), 

OD = 100mm, 

FREE DELIVERY WITHIN THE UK !