Tractor mower compatible BOSCH HIRTH SACHS SOLO STIHL Diameter = 18 mm For models: BOSCH Hirth , Ilo , MAG , Sachs HIRTH 56 , 57 J2 , 57 Z1 , 57 , 60 , 80 , 84 E5 , 84 E6 , 84 M3S SACHS Famo , Stamo SOLO 630 , 632 , 635 , 635 S , 642 STIHL r