Honda OEM Replacement Blade 305-1029
FITS MODELS: HRB535, HRB536, HRD535, HRD536, HRG536C, HRH536, IZY 535 SDE
Length 7/8'' (22mm)
Centre Hole 7/16'' x 9/16'' (10.5mm x 14mm) 
Centre 3 5/8'' (92mm)
Width 3 5/32'' (80mm) 
Thickness 3/32'' (2.5mm)