Blade holder hub for blade support mounted left in the direction of travel right-hand thread lawn tractor lawn mower compatible STIGA CASTEL GARDEN Length (mm): 180 Blade holder (mm): separate flange Weight: 1.35 Kg For models: STIGA 1236 M , 1436 H , 1436 M , 1438 M , 1636 H , 1636 M , Estate Basic , Estate Collector , Estate President , Estate Senator , Estate Tornado , HTE 92