Toro OEM Replacement Blade 350-223
FITS MODELS: Time Cutter Z 
Requires 3 for 50'' deck; medium-lift blade 
Length 17 1/2'' (431.8mm)
Centre Hole 5/8'' (15.9mm)
Width 2 1/4'' (57.2mm)
Thickness .164'' (4.2mm)